{"id":795,"date":"2023-09-20T16:57:19","date_gmt":"2023-04-21T23:37:59","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/c-c%e4%b8%ad%e7%9a%84%e5%ad%97%e5%85%b8%e6%a0%91%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84\/"},"modified":"2025-08-03T08:27:08","modified_gmt":"2025-08-03T00:27:08","slug":"c-c%e4%b8%ad%e7%9a%84%e5%ad%97%e5%85%b8%e6%a0%91%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/c-c%e4%b8%ad%e7%9a%84%e5%ad%97%e5%85%b8%e6%a0%91%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84\/","title":{"rendered":"\u6df1\u5165\u7406\u89e3C\/C++\u5b57\u5178\u6811\uff1a\u539f\u7406\u3001\u5b9e\u73b0\u4e0e\u4f18\u5316\u6280\u5de7"},"content":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aC\/C++\u4e2d\u7684\u5b57\u5178\u6811\u6570\u636e\u7ed3\u6784\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51717\u90e8\u5206\uff09\u3002<\/p>\n<p>\u5b57\u5178\u6811\uff08Trie\uff09\u6570\u636e\u7ed3\u6784\u4f5c\u4e3a\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\u7684\u5bb9\u5668\u3002\u5728\u672c\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u770b\u4e00\u4e0b\u5982\u4f55\u5728C\/C++\u4e2d\u5b9e\u73b0\u4e00\u4e2a\u5b57\u5178\u6811\uff08Trie\uff09\u3002<\/p>\n<p>\u8fd9\u662f\u57fa\u4e8e\u6811\u6570\u636e\u7ed3\u6784\u7684\uff0c\u4f46\u4e0d\u4e00\u5b9a\u5b58\u50a8\u952e\u3002\u5728\u8fd9\u91cc\uff0c\u6bcf\u4e2a\u8282\u70b9\u53ea\u6709\u4e00\u4e2a\u503c\uff0c\u8be5\u503c\u662f\u6839\u636e\u4f4d\u7f6e\u5b9a\u4e49\u7684\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65647413a4b2f92e6c729683\/2-0.png\" alt=\"\" \/><\/div>\n<p>\u6240\u4ee5\uff0c\u6bcf\u4e2a\u8282\u70b9\u7684\u503c\u8868\u793a\u524d\u7f00\uff0c\u56e0\u4e3a\u5b83\u662f\u7ecf\u8fc7\u4e00\u7cfb\u5217\u5339\u914d\u540e\u4ece\u6839\u8282\u70b9\u51fa\u53d1\u7684\u70b9\u3002<\/p>\n<p>\u6211\u4eec\u628a\u8fd9\u6837\u7684\u5339\u914d\u79f0\u4e3a\u524d\u7f00\u5339\u914d\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5b57\u5178\u6811\uff08Trie\uff09\u6765\u5b58\u50a8\u5b57\u5178\u4e2d\u7684\u8bcd\u8bed\uff01<\/p>\n<p>\u4f8b\u5982\uff0c\u5728\u4e0a\u56fe\u4e2d\uff0c\u6839\u8282\u70b9\u4e3a\u7a7a\uff0c\u56e0\u6b64\u6bcf\u4e2a\u5b57\u7b26\u4e32\u90fd\u5339\u914d\u6839\u8282\u70b9\u3002\u8282\u70b97\u5339\u914d\u4e86\u4e00\u4e2a\u4ee5&#8221;to&#8221;\u4e3a\u524d\u7f00\u7684\u5b57\u7b26\u4e32\uff0c\u800c\u8282\u70b93\u5339\u914d\u4e86\u4e00\u4e2a\u4ee5&#8221;tea&#8221;\u4e3a\u524d\u7f00\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<p>\u5728\u8fd9\u91cc\uff0c\u952e\u53ea\u5b58\u50a8\u5728\u53f6\u5b50\u8282\u70b9\u7684\u4f4d\u7f6e\u4e0a\uff0c\u56e0\u4e3a\u524d\u7f00\u5339\u914d\u4f1a\u505c\u5728\u4efb\u4f55\u53f6\u5b50\u8282\u70b9\u3002\u56e0\u6b64\uff0c\u4efb\u4f55\u975e\u53f6\u5b50\u8282\u70b9\u90fd\u4e0d\u5b58\u50a8\u6574\u4e2a\u5b57\u7b26\u4e32\uff0c\u800c\u53ea\u5b58\u50a8\u524d\u7f00\u5339\u914d\u7684\u5b57\u7b26\u3002<\/p>\n<p>\u51fa\u4e8e\u8fd9\u4e9b\u539f\u56e0\uff0c\u5b57\u5178\u6811\u4e5f\u88ab\u79f0\u4e3a\u524d\u7f00\u6811\u3002\u73b0\u5728\u8ba9\u6211\u4eec\u4ece\u7a0b\u5e8f\u5458\u7684\u89d2\u5ea6\u6765\u7406\u89e3\u5982\u4f55\u5b9e\u73b0\u8fd9\u79cd\u6570\u636e\u7ed3\u6784\u3002<\/p>\n<hr \/>\n<h2>\u5728C\/C++\u4e2d\u5b9e\u73b0\u5b57\u5178\u6811\u6570\u636e\u7ed3\u6784<\/h2>\n<p>\u8ba9\u6211\u4eec\u9996\u5148\u5199\u4e0b\u5b57\u5178\u6811\u7ed3\u6784\u3002\u5b57\u5178\u6811\u8282\u70b9\u4e3b\u8981\u6709\u4e24\u4e2a\u7ec4\u6210\u90e8\u5206\u3002<\/p>\n<ul class=\"post-ul\">\n<li>\u5b83\u7684\u5b50\u8282\u70b9<\/li>\n<li>\u4e00\u4e2a\u6807\u8bb0\uff0c\u7528\u4e8e\u6307\u793a\u53f6\u5b50\u8282\u70b9<\/li>\n<\/ul>\n<p>\u7136\u800c\uff0c\u7531\u4e8e\u6211\u4eec\u8fd8\u5c06\u6253\u5370\u5b57\u5178\u6811\uff0c\u5982\u679c\u6211\u4eec\u80fd\u591f\u5728\u6570\u636e\u90e8\u5206\u4e2d\u5b58\u50a8\u4e00\u4e2a\u9644\u52a0\u5c5e\u6027\uff0c\u90a3\u5c06\u66f4\u5bb9\u6613\u3002<\/p>\n<p>\u90a3\u4e48\u8ba9\u6211\u4eec\u6765\u5b9a\u4e49TrieNode\u7684\u7ed3\u6784\u3002\u5728\u8fd9\u91cc\uff0c\u7531\u4e8e\u6211\u53ea\u4f1a\u5b58\u50a8\u5c0f\u5199\u5b57\u6bcd\uff0c\u6211\u5c06\u5c06\u5176\u5b9e\u73b0\u4e3a\u4e00\u68f526\u53c9\u6811\u3002\u56e0\u6b64\uff0c\u6bcf\u4e2a\u8282\u70b9\u5c06\u6709\u6307\u541126\u4e2a\u5b50\u8282\u70b9\u7684\u6307\u9488\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token comment\">\/\/ \u6bcf\u4e2a\u8282\u70b9\u7684\u5b50\u8282\u70b9\u6570\u91cf<\/span>\r\n<span class=\"token comment\">\/\/ \u6211\u4eec\u5c06\u6784\u5efa\u4e00\u4e2aN\u53c9\u6811\u5e76\u4f7f\u5176\u6210\u4e3a\u5b57\u5178\u6811<\/span>\r\n<span class=\"token comment\">\/\/ \u7531\u4e8e\u6211\u4eec\u670926\u4e2a\u82f1\u6587\u5b57\u6bcd\uff0c\u6bcf\u4e2a\u8282\u70b9\u9700\u898126\u4e2a\u5b50\u8282\u70b9<\/span>\r\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">N<\/span> <span class=\"token expression\"><span class=\"token number\">26<\/span><\/span><\/span>\r\n\r\n<span class=\"token keyword\">typedef<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">TrieNode<\/span> TrieNode<span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">TrieNode<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u5b57\u5178\u6811\u8282\u70b9\u7ed3\u6784<\/span>\r\n    <span class=\"token comment\">\/\/ \u6bcf\u4e2a\u8282\u70b9\u4ece\u6839\u8282\u70b9\u5f00\u59cb\u6709N\u4e2a\u5b50\u8282\u70b9<\/span>\r\n    <span class=\"token comment\">\/\/ \u8fd8\u6709\u4e00\u4e2a\u6807\u8bb0\u6765\u68c0\u67e5\u5b83\u662f\u5426\u662f\u53f6\u5b50\u8282\u70b9<\/span>\r\n    <span class=\"token keyword\">char<\/span> data<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u4ec5\u7528\u4e8e\u6253\u5370\u76ee\u7684<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> children<span class=\"token punctuation\">[<\/span>N<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">int<\/span> is_leaf<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u65e2\u7136\u6211\u4eec\u5df2\u7ecf\u5b9a\u4e49\u4e86\u7ed3\u6784\uff0c\u8ba9\u6211\u4eec\u7f16\u5199\u51fd\u6570\u6765\u521d\u59cb\u5316\u5b57\u5178\u6811\u8282\u70b9\uff0c\u5e76\u4e14\u8fd8\u8981\u91ca\u653e\u5176\u6307\u9488\u3002<\/p>\n<pre class=\"post-pre\"><code>TrieNode<span class=\"token operator\">*<\/span> <span class=\"token function\">make_trienode<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span> data<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u4e3a\u5b57\u5178\u6811\u8282\u70b9\u5206\u914d\u5185\u5b58<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> node <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token function\">calloc<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&lt;<\/span>N<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span>\r\n        node<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span>\r\n    node<span class=\"token operator\">-&gt;<\/span>is_leaf <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n    node<span class=\"token operator\">-&gt;<\/span>data <span class=\"token operator\">=<\/span> data<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> node<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">free_trienode<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> node<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u91ca\u653e\u5b57\u5178\u6811\u8282\u70b9\u5e8f\u5217<\/span>\r\n    <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&lt;<\/span>N<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>node<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token function\">free_trienode<\/span><span class=\"token punctuation\">(<\/span>node<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token function\">free<\/span><span class=\"token punctuation\">(<\/span>node<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u5c06\u4e00\u4e2a\u8bcd\u63d2\u5165\u5230\u5b57\u5178\u6811\u6570\u636e\u7ed3\u6784\u4e2d<\/h3>\n<p>\u8fd9\u662f\u6587\u7ae0\u300aC\/C++\u4e2d\u7684\u5b57\u5178\u6811\u6570\u636e\u7ed3\u6784\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51717\u90e8\u5206\uff09\u3002<\/p>\n<p>\u73b0\u5728\u6211\u4eec\u5c06\u7f16\u5199insert_trie()\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u63a5\u6536\u6839\u8282\u70b9\uff08\u6700\u9876\u5c42\u8282\u70b9\uff09\u7684\u6307\u9488\uff0c\u5e76\u5c06\u4e00\u4e2a\u5355\u8bcd\u63d2\u5165\u5230\u5b57\u5178\u6811\uff08Trie\uff09\u4e2d\u3002<\/p>\n<p>\u63d2\u5165\u8fc7\u7a0b\u5f88\u7b80\u5355\u3002\u5b83\u9010\u4e2a\u5b57\u7b26\u5730\u8fed\u4ee3\u5355\u8bcd\uff0c\u5e76\u8bc4\u4f30\u5176\u76f8\u5bf9\u4f4d\u7f6e\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5b57\u7b26&#8217;b&#8217;\u7684\u4f4d\u7f6e\u662f1\uff0c\u6240\u4ee5\u5b83\u5c06\u6210\u4e3a\u7b2c\u4e8c\u4e2a\u5b50\u5143\u7d20\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u83b7\u53d6\u5b57\u6bcd\u8868\u4e2d\u7684\u76f8\u5bf9\u4f4d\u7f6e<\/span>\r\n    <span class=\"token keyword\">int<\/span> idx <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token comment\">\/\/ \u5982\u679c\u5bf9\u5e94\u7684\u5b50\u8282\u70b9\u4e0d\u5b58\u5728\uff0c<\/span>\r\n        <span class=\"token comment\">\/\/ \u5c31\u521b\u5efa\u8be5\u5b50\u8282\u70b9\uff01<\/span>\r\n        temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token function\">make_trienode<\/span><span class=\"token punctuation\">(<\/span>word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token comment\">\/\/ \u4e0d\u505a\u4efb\u4f55\u64cd\u4f5c\u3002\u8be5\u8282\u70b9\u5df2\u5b58\u5728<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6211\u4eec\u5c06\u9010\u4e2a\u5b57\u7b26\u5339\u914d\u524d\u7f00\uff0c\u5e76\u5728\u5fc5\u8981\u65f6\u7b80\u5355\u5730\u521d\u59cb\u5316\u4e00\u4e2a\u8282\u70b9\u3002<\/p>\n<p>\u5426\u5219\uff0c\u6211\u4eec\u53ea\u9700\u8981\u4e00\u76f4\u6cbf\u7740\u94fe\u6761\u5411\u4e0b\u79fb\u52a8\uff0c\u76f4\u5230\u5339\u914d\u6240\u6709\u5b57\u7b26\u3002<\/p>\n<pre class=\"post-pre\"><code>temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u6700\u540e\uff0c\u6211\u4eec\u5c06\u63d2\u5165\u6240\u6709\u4e0d\u5339\u914d\u7684\u5b57\u7b26\uff0c\u5e76\u5c06\u66f4\u65b0\u540e\u7684\u5b57\u5178\u6811\uff08Trie\uff09\u8fd4\u56de\u3002<\/p>\n<pre class=\"post-pre\"><code>TrieNode<span class=\"token operator\">*<\/span> <span class=\"token function\">insert_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u5c06\u5355\u8bcd\u63d2\u5165\u5230\u5b57\u5178\u6811\u4e2d<\/span>\r\n    <span class=\"token comment\">\/\/ \u5047\u8bbe\uff1a\u5355\u8bcd\u53ea\u5305\u542b\u5c0f\u5199\u5b57\u6bcd<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token comment\">\/\/ \u83b7\u53d6\u5b57\u6bcd\u8868\u4e2d\u7684\u76f8\u5bf9\u4f4d\u7f6e<\/span>\r\n        <span class=\"token keyword\">int<\/span> idx <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u5982\u679c\u5bf9\u5e94\u7684\u5b50\u8282\u70b9\u4e0d\u5b58\u5728\uff0c<\/span>\r\n            <span class=\"token comment\">\/\/ \u5c31\u521b\u5efa\u8be5\u5b50\u8282\u70b9\uff01<\/span>\r\n            temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token function\">make_trienode<\/span><span class=\"token punctuation\">(<\/span>word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u4e0d\u505a\u4efb\u4f55\u64cd\u4f5c\u3002\u8be5\u8282\u70b9\u5df2\u5b58\u5728<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token comment\">\/\/ \u5411\u4e0b\u79fb\u52a8\u4e00\u5c42\uff0c\u5230idx\u5f15\u7528\u7684\u5b50\u8282\u70b9<\/span>\r\n        <span class=\"token comment\">\/\/ \u56e0\u4e3a\u6211\u4eec\u6709\u524d\u7f00\u5339\u914d<\/span>\r\n        temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token comment\">\/\/ \u5728\u5355\u8bcd\u7684\u672b\u5c3e\uff0c\u5c06\u6b64\u8282\u70b9\u6807\u8bb0\u4e3a\u53f6\u5b50\u8282\u70b9<\/span>\r\n    temp<span class=\"token operator\">-&gt;<\/span>is_leaf <span class=\"token operator\">=<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u5728\u5b57\u5178\u6811\uff08Trie\uff09\u4e2d\u641c\u7d22\u5355\u8bcd<\/h3>\n<h2>C\/C++\u4e2d\u7684\u5b57\u5178\u6811\u6570\u636e\u7ed3\u6784 &#8211; \u7b2c3\u90e8\u5206\uff08\u51717\u90e8\u5206\uff09<\/h2>\n<p>\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u5b9e\u73b0\u4e86\u5b57\u5178\u6811(Trie)\u7684\u63d2\u5165\u64cd\u4f5c\uff0c\u63a5\u4e0b\u6765\u8ba9\u6211\u4eec\u770b\u4e00\u4e0b\u5982\u4f55\u641c\u7d22\u7ed9\u5b9a\u7684\u6a21\u5f0f\u3002<\/p>\n<p>\u6211\u4eec\u5c06\u5c1d\u8bd5\u9010\u4e2a\u5b57\u7b26\u5339\u914d\u5b57\u7b26\u4e32\uff0c\u91c7\u7528\u4e0e\u524d\u9762\u76f8\u540c\u7684\u524d\u7f00\u5339\u914d\u7b56\u7565\u3002<\/p>\n<p>\u5982\u679c\u6211\u4eec\u5df2\u7ecf\u5230\u8fbe\u94fe\u7684\u672b\u5c3e\uff0c\u4f46\u4ecd\u7136\u6ca1\u6709\u627e\u5230\u5339\u914d\u9879\uff0c\u8fd9\u610f\u5473\u7740\u5b57\u7b26\u4e32\u4e0d\u5b58\u5728\uff0c\u56e0\u4e3a\u6ca1\u6709\u5b8c\u6210\u5b8c\u6574\u7684\u524d\u7f00\u5339\u914d\u3002<\/p>\n<p>\u4e3a\u4e86\u4f7f\u641c\u7d22\u6b63\u786e\u8fd4\u56de\uff0c\u6211\u4eec\u7684\u6a21\u5f0f\u5fc5\u987b\u5b8c\u5168\u5339\u914d\uff0c\u5e76\u4e14\u5728\u5339\u914d\u5b8c\u6210\u540e\uff0c\u6211\u4eec\u5fc5\u987b\u5230\u8fbe\u4e00\u4e2a\u53f6\u8282\u70b9\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">int<\/span> <span class=\"token function\">search_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u5728\u5b57\u5178\u6811\u4e2d\u641c\u7d22\u5355\u8bcd<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token operator\">!=<\/span><span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span>\r\n    <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span> position <span class=\"token operator\">=<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-><\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span>\r\n            <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n        temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-><\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp <span class=\"token operator\">!=<\/span> <span class=\"token constant\">NULL<\/span> <span class=\"token operator\">&&<\/span> temp<span class=\"token operator\">-><\/span>is_leaf <span class=\"token operator\">==<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u597d\u7684\uff0c\u6211\u4eec\u5df2\u7ecf\u5b8c\u6210\u4e86\u63d2\u5165\u548c\u641c\u7d22\u7684\u6b65\u9aa4\u3002<\/p>\n<p>\u4e3a\u4e86\u6d4b\u8bd5\u8fd9\u4e9b\u529f\u80fd\uff0c\u6211\u4eec\u9996\u5148\u7f16\u5199\u4e00\u4e2aprint_trie()\u51fd\u6570\uff0c\u7528\u4e8e\u6253\u5370\u6bcf\u4e2a\u8282\u70b9\u7684\u6570\u636e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">void<\/span> <span class=\"token function\">print_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u6253\u5370\u5b57\u5178\u6811\u7684\u8282\u70b9<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>root<span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"%c -> \"<\/span><span class=\"token punctuation\">,<\/span> temp<span class=\"token operator\">-><\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\"><<\/span>N<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token function\">print_trie<\/span><span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-><\/span>children<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> \r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u65e2\u7136\u6211\u4eec\u5df2\u7ecf\u5b9e\u73b0\u4e86\u8fd9\u4e9b\u529f\u80fd\uff0c\u8ba9\u6211\u4eec\u8fd0\u884c\u5b8c\u6574\u7684\u7a0b\u5e8f\u6765\u68c0\u67e5\u5b83\u662f\u5426\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\"><stdio.h><\/span><\/span>\r\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\"><stdlib.h><\/span><\/span>\r\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\"><string.h><\/span><\/span>\r\n\r\n<span class=\"token comment\">\/\/ \u6bcf\u4e2a\u8282\u70b9\u7684\u5b50\u8282\u70b9\u6570\u91cf<\/span>\r\n<span class=\"token comment\">\/\/ \u6211\u4eec\u5c06\u6784\u5efa\u4e00\u4e2aN\u53c9\u6811\u5e76\u4f7f\u5176\u6210\u4e3a\u5b57\u5178\u6811<\/span>\r\n<span class=\"token comment\">\/\/ \u7531\u4e8e\u6211\u4eec\u670926\u4e2a\u82f1\u6587\u5b57\u6bcd\uff0c\u6bcf\u4e2a\u8282\u70b9\u9700\u8981<\/span>\r\n<span class=\"token comment\">\/\/ 26\u4e2a\u5b50\u8282\u70b9<\/span>\r\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">N<\/span> <span class=\"token expression\"><span class=\"token number\">26<\/span><\/span><\/span>\r\n\r\n<span class=\"token keyword\">typedef<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">TrieNode<\/span> TrieNode<span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">TrieNode<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u5b57\u5178\u6811\u8282\u70b9\u7ed3\u6784<\/span>\r\n    <span class=\"token comment\">\/\/ \u6bcf\u4e2a\u8282\u70b9\u6709N\u4e2a\u5b50\u8282\u70b9\uff0c\u4ece\u6839\u8282\u70b9\u5f00\u59cb<\/span>\r\n    <span class=\"token comment\">\/\/ \u4ee5\u53ca\u4e00\u4e2a\u6807\u8bb0\u662f\u5426\u4e3a\u53f6\u8282\u70b9\u7684\u6807\u5fd7<\/span>\r\n    <span class=\"token keyword\">char<\/span> data<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u4ec5\u7528\u4e8e\u6253\u5370\u76ee\u7684\u5b58\u50a8<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> children<span class=\"token punctuation\">[<\/span>N<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">int<\/span> is_leaf<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\nTrieNode<span class=\"token operator\">*<\/span> <span class=\"token function\">make_trienode<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span> data<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u4e3a\u5b57\u5178\u6811\u8282\u70b9\u5206\u914d\u5185\u5b58<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> node <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token function\">calloc<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\"><<\/span>N<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span>\r\n        node<span class=\"token operator\">-><\/span>children<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span>\r\n    node<span class=\"token operator\">-><\/span>is_leaf <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n    node<span class=\"token operator\">-><\/span>data <span class=\"token operator\">=<\/span> data<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> node<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">free_trienode<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> node<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u91ca\u653e\u5b57\u5178\u6811\u8282\u70b9\u5e8f\u5217<\/span>\r\n    <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\"><<\/span>N<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>node<span class=\"token operator\">-><\/span>children<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token function\">free_trienode<\/span><span class=\"token punctuation\">(<\/span>node<span class=\"token operator\">-><\/span>children<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token function\">free<\/span><span class=\"token punctuation\">(<\/span>node<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\nTrieNode<span class=\"token operator\">*<\/span> <span class=\"token function\">insert_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u5c06\u5355\u8bcd\u63d2\u5165\u5230\u5b57\u5178\u6811\u4e2d<\/span>\r\n    <span class=\"token comment\">\/\/ \u5047\u8bbe\uff1a\u5355\u8bcd\u53ea\u5305\u542b\u5c0f\u5199\u5b57\u7b26<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token comment\">\/\/ \u83b7\u53d6\u5b57\u6bcd\u8868\u4e2d\u7684\u76f8\u5bf9\u4f4d\u7f6e<\/span>\r\n        <span class=\"token keyword\">int<\/span> idx <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-><\/span>children<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u5982\u679c\u76f8\u5e94\u7684\u5b50\u8282\u70b9\u4e0d\u5b58\u5728\uff0c<\/span>\r\n            <span class=\"token comment\">\/\/ \u5c31\u521b\u5efa\u8be5\u5b50\u8282\u70b9\uff01<\/span>\r\n            temp<span class=\"token operator\">-><\/span>children<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token function\">make_trienode<\/span><span class=\"token punctuation\">(<\/span>word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u4ec0\u4e48\u90fd\u4e0d\u505a\u3002\u8282\u70b9\u5df2\u7ecf\u5b58\u5728<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token comment\">\/\/ \u5411\u4e0b\u4e00\u5c42\uff0c\u5230idx\u5f15\u7528\u7684\u5b50\u8282\u70b9<\/span>\r\n        <span class=\"token comment\">\/\/ \u56e0\u4e3a\u6211\u4eec\u6709\u524d\u7f00\u5339\u914d<\/span>\r\n        temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-><\/span>children<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token comment\">\/\/ \u5728\u5355\u8bcd\u7684\u672b\u5c3e\uff0c\u5c06\u6b64\u8282\u70b9\u6807\u8bb0\u4e3a\u53f6\u8282\u70b9<\/span>\r\n    temp<span class=\"token operator\">-><\/span>is_leaf <span class=\"token operator\">=<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">search_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u5728\u5b57\u5178\u6811\u4e2d\u641c\u7d22\u5355\u8bcd<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token operator\">!=<\/span><span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span>\r\n    <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span> position <span class=\"token operator\">=<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-><\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span>\r\n            <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n        temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-><\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp <span class=\"token operator\">!=<\/span> <span class=\"token constant\">NULL<\/span> <span class=\"token operator\">&&<\/span> temp<span class=\"token operator\">-><\/span>is_leaf <span class=\"token operator\">==<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">print_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u6253\u5370\u5b57\u5178\u6811\u7684\u8282\u70b9<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>root<span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"%c -> \"<\/span><span class=\"token punctuation\">,<\/span> temp<span class=\"token operator\">-><\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\"><<\/span>N<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token function\">print_trie<\/span><span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-><\/span>children<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> \r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u641c\u7d22 %s: \"<\/span><span class=\"token punctuation\">,<\/span> word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">search_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">==<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u672a\u627e\u5230\\n\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">else<\/span>\r\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u5df2\u627e\u5230\uff01\\n\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u5b57\u5178\u6811\u6570\u636e\u7ed3\u6784\u64cd\u4f5c\u7684\u9a71\u52a8\u7a0b\u5e8f<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> root <span class=\"token operator\">=<\/span> <span class=\"token function\">make_trienode<\/span><span class=\"token punctuation\">(<\/span><span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    root <span class=\"token operator\">=<\/span> <span class=\"token function\">insert_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"hello\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    root <span class=\"token operator\">=<\/span> <span class=\"token function\">insert_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"hi\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    root <span class=\"token operator\">=<\/span> <span class=\"token function\">insert_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"teabag\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    root <span class=\"token operator\">=<\/span> <span class=\"token function\">insert_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"teacan\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"tea\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"teabag\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"teacan\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"hi\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"hey\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"hello\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">free_trienode<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4f7f\u7528gcc\u7f16\u8bd1\u5668\u7f16\u8bd1\u540e\uff0c\u4f60\u5c06\u5f97\u5230\u4ee5\u4e0b\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code>\u641c\u7d22 <span class=\"token keyword\">for<\/span> tea: \u672a\u627e\u5230\r\n\u641c\u7d22 <span class=\"token keyword\">for<\/span> teabag: \u5df2\u627e\u5230\uff01\r\n\u641c\u7d22 <span class=\"token keyword\">for<\/span> teacan: \u5df2\u627e\u5230\uff01\r\n\u641c\u7d22 <span class=\"token keyword\">for<\/span> hi: \u5df2\u627e\u5230\uff01\r\n\u641c\u7d22 <span class=\"token keyword\">for<\/span> hey: \u672a\u627e\u5230\r\n\u641c\u7d22 <span class=\"token keyword\">for<\/span> hello: \u5df2\u627e\u5230\uff01\r\n -<span class=\"token operator\">><\/span> h -<span class=\"token operator\">><\/span> e -<span class=\"token operator\">><\/span> l -<span class=\"token operator\">><\/span> l -<span class=\"token operator\">><\/span> o -<span class=\"token operator\">><\/span> i -<span class=\"token operator\">><\/span> t -<span class=\"token operator\">><\/span> e -<span class=\"token operator\">><\/span> a -<span class=\"token operator\">><\/span> b -<span class=\"token operator\">><\/span> a -<span class=\"token operator\">><\/span> g -<span class=\"token operator\">><\/span> c -<span class=\"token operator\">><\/span> a -<span class=\"token operator\">><\/span> n -<span class=\"token operator\">><\/span> \r\n<\/code><\/pre>\n<p>\u867d\u7136\u6253\u5370\u65b9\u5f0f\u53ef\u80fd\u4e0d\u592a\u76f4\u89c2\uff0c\u4f46\u5173\u952e\u5728\u4e8e\u67e5\u770bprint_trie()\u65b9\u6cd5\u3002\u56e0\u4e3a\u8be5\u65b9\u6cd5\u9996\u5148\u6253\u5370\u5f53\u524d\u8282\u70b9\uff0c\u7136\u540e\u6253\u5370\u5176\u6240\u6709\u5b50\u8282\u70b9\uff0c\u6240\u4ee5\u8fd9\u4e2a\u987a\u5e8f\u786e\u5b9e\u8868\u660e\u4e86\u6253\u5370\u7684\u987a\u5e8f\u3002<\/p>\n<p>\u90a3\u4e48\uff0c\u73b0\u5728\u8ba9\u6211\u4eec\u6765\u5b9e\u73b0\u5220\u9664\u65b9\u6cd5\u5427\uff01<\/p>\n<h3>\u4ece\u5b57\u5178\u6811\u6570\u636e\u7ed3\u6784\u4e2d\u5220\u9664\u4e00\u4e2a\u5355\u8bcd<\/h3>\n<p>\u8fd9\u4e2a\u65b9\u6cd5\u6bd4\u53e6\u5916\u4e24\u4e2a\u65b9\u6cd5\u7a0d\u5fae\u590d\u6742\u4e00\u4e9b\u3002<\/p>\n<p>\u7531\u4e8e\u6211\u4eec\u6ca1\u6709\u660e\u786e\u5b58\u50a8\u952e\u548c\u503c\u7684\u65b9\u5f0f\uff0c\u56e0\u6b64\u4e0d\u5b58\u5728\u4efb\u4f55\u683c\u5f0f\u7b97\u6cd5\u3002<\/p>\n<p>\u7136\u800c\uff0c\u9488\u5bf9\u672c\u6587\u7684\u76ee\u7684\uff0c\u6211\u53ea\u4f1a\u5904\u7406\u90a3\u4e9b\u5f85\u5220\u9664\u7684\u8bcd\u662f\u53f6\u8282\u70b9\u7684\u60c5\u51b5\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b83\u5fc5\u987b\u5b8c\u5168\u5339\u914d\u524d\u7f00\uff0c\u76f4\u81f3\u8fbe\u5230\u4e00\u4e2a\u53f6\u8282\u70b9\u3002<\/p>\n<p>\u90a3\u4e48\u8ba9\u6211\u4eec\u5f00\u59cb\u5427\u3002\u6211\u4eec\u5220\u9664\u51fd\u6570\u7684\u7b7e\u540d\u5c06\u662f\uff1a<\/p>\n<pre class=\"post-pre\"><code>TrieNode<span class=\"token operator\">*<\/span> <span class=\"token function\">delete_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u524d\u9762\u63d0\u5230\u8fc7\uff0c\u53ea\u6709\u5f53\u5339\u914d\u7684\u524d\u7f00\u8fbe\u5230\u53f6\u8282\u70b9\u65f6\uff0c\u624d\u4f1a\u6267\u884c\u5220\u9664\u64cd\u4f5c\u3002\u56e0\u6b64\uff0c\u8ba9\u6211\u4eec\u7f16\u5199\u53e6\u4e00\u4e2a\u51fd\u6570is_leaf_node()\u6765\u4e3a\u6211\u4eec\u6267\u884c\u6b64\u64cd\u4f5c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">int<\/span> <span class=\"token function\">is_leaf_node<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ Checks if the prefix match of word and root<\/span>\r\n    <span class=\"token comment\">\/\/ is a leaf node<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span> position <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token keyword\">return<\/span> temp<span class=\"token operator\">-&gt;<\/span>is_leaf<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u597d\u7684\uff0c\u5b8c\u6210\u4e86\u4e4b\u540e\uff0c\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u6211\u4eec\u7684delete_trie()\u65b9\u6cd5\u7684\u8349\u7a3f\u3002<\/p>\n<pre class=\"post-pre\"><code>TrieNode<span class=\"token operator\">*<\/span> <span class=\"token function\">delete_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ Will try to delete the word sequence from the Trie only it <\/span>\r\n    <span class=\"token comment\">\/\/ ends up in a leaf node<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>root<span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>word <span class=\"token operator\">||<\/span> word<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token comment\">\/\/ If the node corresponding to the match is not a leaf node,<\/span>\r\n    <span class=\"token comment\">\/\/ we stop<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token function\">is_leaf_node<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token comment\">\/\/ TODO<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7ecf\u8fc7\u8fd9\u4e2a\u68c0\u67e5\u4e4b\u540e\uff0c\u6211\u4eec\u73b0\u5728\u77e5\u9053\u6211\u4eec\u7684\u8bcd\u5c06\u4ee5\u53f6\u8282\u70b9\u7ed3\u675f\u3002<\/p>\n<p>\u4f46\u8fd8\u6709\u53e6\u5916\u4e00\u79cd\u60c5\u51b5\u9700\u8981\u5904\u7406\u3002\u5982\u679c\u5b58\u5728\u53e6\u4e00\u4e2a\u5355\u8bcd\u4e0e\u5f53\u524d\u5b57\u7b26\u4e32\u5177\u6709\u90e8\u5206\u524d\u7f00\u5339\u914d\u7684\u60c5\u51b5\u600e\u4e48\u529e\uff1f<\/p>\n<p>\u4f8b\u5982\uff0c\u5728\u4e0b\u9762\u7684\u5b57\u5178\u6811\u4e2d\uff0c\u5355\u8bcd&#8221;tea&#8221;\u548c&#8221;ted&#8221;\u5728&#8221;te&#8221;\u4e4b\u524d\u6709\u90e8\u5206\u76f8\u540c\u7684\u5339\u914d\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65647413a4b2f92e6c729683\/55-0.png\" alt=\"\" \/><\/p>\n<p>\u6240\u4ee5\uff0c\u5982\u679c\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\uff0c\u6211\u4eec\u4e0d\u80fd\u7b80\u5355\u5730\u4ecet\u5230a\u5220\u9664\u6574\u4e2a\u5e8f\u5217\uff0c\u56e0\u4e3a\u5b83\u4eec\u662f\u94fe\u63a5\u5728\u4e00\u8d77\u7684\uff0c\u90a3\u6837\u4e24\u4e2a\u94fe\u90fd\u4f1a\u88ab\u5220\u9664\uff01<\/p>\n<p>\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u627e\u5230\u80fd\u591f\u51fa\u73b0\u8fd9\u79cd\u5339\u914d\u7684\u6700\u6df1\u70b9\u3002\u53ea\u6709\u5728\u90a3\u4e4b\u540e\uff0c\u6211\u4eec\u624d\u80fd\u5220\u9664\u5269\u4f59\u7684\u94fe\u6761\u3002<\/p>\n<p>\u8fd9\u6d89\u53ca\u5230\u67e5\u627e\u6700\u957f\u7684\u524d\u7f00\u5b57\u7b26\u4e32\uff0c\u6240\u4ee5\u8ba9\u6211\u4eec\u5199\u53e6\u4e00\u4e2a\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> <span class=\"token function\">longest_prefix<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u5c06\u8fd4\u56de\u5b57\u5178\u6811\u4e2d\u7684\u6700\u957f\u5339\u914d\uff0c\u8be5\u5339\u914d\u5e76\u975e\u5f53\u524d\u7684\u5355\u8bcd\u3002\u4e0b\u9762\u7684\u4ee3\u7801\u5728\u6ce8\u91ca\u4e2d\u89e3\u91ca\u4e86\u6bcf\u4e2a\u4e2d\u95f4\u6b65\u9aa4\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> <span class=\"token function\">find_longest_prefix<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u67e5\u627e\u5b57\u5178\u6811\u4e2d\u5355\u8bcd\u7684\u6700\u957f\u516c\u5171\u524d\u7f00\u5b50\u5b57\u7b26\u4e32<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>word <span class=\"token operator\">||<\/span> word<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token comment\">\/\/ \u6700\u957f\u524d\u7f00\u7684\u957f\u5ea6<\/span>\r\n    <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">=<\/span> <span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token comment\">\/\/ \u6211\u4eec\u6700\u521d\u5c06\u6700\u957f\u524d\u7f00\u8bbe\u7f6e\u4e3a\u5355\u8bcd\u672c\u8eab\uff0c<\/span>\r\n    <span class=\"token comment\">\/\/ \u5e76\u5c1d\u8bd5\u4ece\u6700\u6df1\u4f4d\u7f6e\u56de\u6eaf\u5230<\/span>\r\n    <span class=\"token comment\">\/\/ \u5206\u6b67\u70b9\uff08\u5982\u679c\u5b58\u5728\uff09<\/span>\r\n    <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> longest_prefix <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token function\">calloc<\/span> <span class=\"token punctuation\">(<\/span>len <span class=\"token operator\">+<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span>\r\n        longest_prefix<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    longest_prefix<span class=\"token punctuation\">[<\/span>len<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token comment\">\/\/ \u5982\u679c\u4ece\u6839\u8282\u70b9\u6ca1\u6709\u5206\u652f\uff0c\u8fd9\u610f\u5473\u7740<\/span>\r\n    <span class=\"token comment\">\/\/ \u6211\u4eec\u6b63\u5728\u5339\u914d\u539f\u59cb\u5b57\u7b26\u4e32\uff01<\/span>\r\n    <span class=\"token comment\">\/\/ \u8fd9\u4e0d\u662f\u6211\u4eec\u60f3\u8981\u7684\uff01<\/span>\r\n    <span class=\"token keyword\">int<\/span> branch_idx  <span class=\"token operator\">=<\/span> <span class=\"token function\">check_divergence<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> longest_prefix<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>branch_idx <span class=\"token operator\">&gt;=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token comment\">\/\/ \u5b58\u5728\u5206\u652f\uff0c\u6211\u4eec\u5fc5\u987b\u66f4\u65b0\u4f4d\u7f6e<\/span>\r\n        <span class=\"token comment\">\/\/ \u5230\u6700\u957f\u5339\u914d\u5904\uff0c\u5e76\u901a\u8fc7\u5206\u652f\u7d22\u5f15\u957f\u5ea6<\/span>\r\n        <span class=\"token comment\">\/\/ \u66f4\u65b0\u6700\u957f\u524d\u7f00<\/span>\r\n        longest_prefix<span class=\"token punctuation\">[<\/span>branch_idx<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span>\r\n        longest_prefix <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token function\">realloc<\/span> <span class=\"token punctuation\">(<\/span>longest_prefix<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>branch_idx <span class=\"token operator\">+<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token keyword\">return<\/span> longest_prefix<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u91cc\u8fd8\u6709\u4e00\u4e2a\u53d8\u5316\uff01\u7531\u4e8e\u6211\u4eec\u8bd5\u56fe\u627e\u5230\u6700\u957f\u7684\u5339\u914d\uff0c\u7b97\u6cd5\u5b9e\u9645\u4e0a\u4f1a\u8d2a\u5a6a\u5730\u5339\u914d\u539f\u59cb\u5b57\u7b26\u4e32\u672c\u8eab\uff01\u8fd9\u4e0d\u662f\u6211\u4eec\u60f3\u8981\u7684\u3002<\/p>\n<p>\u6211\u4eec\u5e0c\u671b\u627e\u5230\u6700\u957f\u7684\u5339\u914d\u9879\uff0c\u4f46\u6392\u9664\u539f\u59cb\u8f93\u5165\u5b57\u7b26\u4e32\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5fc5\u987b\u4f7f\u7528\u53e6\u4e00\u79cd\u65b9\u6cd5check_divergence()\u8fdb\u884c\u5fc5\u8981\u7684\u68c0\u67e5\u3002<\/p>\n<p>\u8fd9\u5c06\u68c0\u67e5\u4ece\u6839\u8282\u70b9\u5230\u5f53\u524d\u4f4d\u7f6e\u662f\u5426\u5b58\u5728\u4efb\u4f55\u5206\u652f\uff0c\u5e76\u8fd4\u56de\u6700\u4f73\u5339\u914d\u7684\u957f\u5ea6\uff0c\u8be5\u957f\u5ea6\u4e0d\u662f\u8f93\u5165\u7684\u957f\u5ea6\u3002<\/p>\n<p>\u5982\u679c\u6211\u4eec\u5904\u4e8e\u574f\u94fe\u4e2d\uff0c\u5bf9\u5e94\u4e8e\u539f\u59cb\u5b57\u7b26\u4e32\uff0c\u90a3\u4e48\u5c31\u4e0d\u4f1a\u4ece\u8be5\u70b9\u5206\u53c9\uff01\u6240\u4ee5\u5bf9\u4e8e\u6211\u4eec\u6765\u8bf4\uff0c\u4f7f\u7528check_divergence()\u662f\u907f\u514d\u90a3\u4e2a\u8ba8\u538c\u7684\u70b9\u7684\u597d\u65b9\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">int<\/span> <span class=\"token function\">check_divergence<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u68c0\u67e5\u5355\u8bcd\u7684\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u5904\u662f\u5426\u5b58\u5728\u5206\u652f<\/span>\r\n <span class=\"token comment\">\/\/ \u5e76\u8fd4\u56de\u5355\u8bcd\u4e2d\u53d1\u751f\u5206\u652f\u7684\u6700\u5927\u4f4d\u7f6e<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">=<\/span> <span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>len <span class=\"token operator\">==<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token comment\">\/\/ \u6211\u4eec\u5c06\u8fd4\u56de\u53d1\u751f\u5206\u652f\u7684\u6700\u5927\u7d22\u5f15<\/span>\r\n    <span class=\"token keyword\">int<\/span> last_index <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> len<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span> position <span class=\"token operator\">=<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u5982\u679c\u8be5\u4f4d\u7f6e\u5b58\u5728\u5b50\u8282\u70b9<\/span>\r\n            <span class=\"token comment\">\/\/ \u6211\u4eec\u5c06\u68c0\u67e5\u662f\u5426\u5b58\u5728\u4efb\u4f55\u5176\u4ed6\u5b50\u8282\u70b9<\/span>\r\n            <span class=\"token comment\">\/\/ \u4ee5\u4fbf\u53d1\u751f\u5206\u652f<\/span>\r\n            <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> j<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">&lt;<\/span>N<span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>j <span class=\"token operator\">!=<\/span> position <span class=\"token operator\">&amp;&amp;<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n                    <span class=\"token comment\">\/\/ \u6211\u4eec\u627e\u5230\u4e86\u53e6\u4e00\u4e2a\u5b50\u8282\u70b9\uff01\u8fd9\u662f\u4e00\u4e2a\u5206\u652f\u3002<\/span>\r\n                    <span class=\"token comment\">\/\/ \u66f4\u65b0\u5206\u652f\u4f4d\u7f6e<\/span>\r\n                    last_index <span class=\"token operator\">=<\/span> i <span class=\"token operator\">+<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>\r\n                    <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span>\r\n                <span class=\"token punctuation\">}<\/span>\r\n            <span class=\"token punctuation\">}<\/span>\r\n            <span class=\"token comment\">\/\/ \u79fb\u52a8\u5230\u5e8f\u5217\u4e2d\u7684\u4e0b\u4e00\u4e2a\u5b50\u8282\u70b9<\/span>\r\n            temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token keyword\">return<\/span> last_index<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6700\u540e\uff0c\u6211\u4eec\u786e\u4fdd\u4e0d\u4f1a\u76f2\u76ee\u5730\u5220\u9664\u6574\u4e2a\u94fe\u6761\u3002\u6240\u4ee5\u73b0\u5728\u8ba9\u6211\u4eec\u7ee7\u7eed\u4f7f\u7528\u6211\u4eec\u7684\u5220\u9664\u65b9\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code>TrieNode<span class=\"token operator\">*<\/span> <span class=\"token function\">delete_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u4ec5\u5f53\u5355\u8bcd\u5e8f\u5217\u6700\u7ec8\u4ee5\u53f6\u5b50\u8282\u70b9\u7ed3\u675f\u65f6<\/span>\r\n    <span class=\"token comment\">\/\/ \u624d\u5c1d\u8bd5\u4ece\u5b57\u5178\u6811\u4e2d\u5220\u9664\u8be5\u5355\u8bcd\u5e8f\u5217<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>root<span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>word <span class=\"token operator\">||<\/span> word<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token comment\">\/\/ \u5982\u679c\u5bf9\u5e94\u4e8e\u5339\u914d\u7684\u8282\u70b9\u4e0d\u662f\u53f6\u5b50\u8282\u70b9\uff0c<\/span>\r\n    <span class=\"token comment\">\/\/ \u6211\u4eec\u505c\u6b62<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token function\">is_leaf_node<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token comment\">\/\/ \u67e5\u627e\u4e0d\u662f\u5f53\u524d\u5355\u8bcd\u7684\u6700\u957f\u524d\u7f00\u5b57\u7b26\u4e32<\/span>\r\n    <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> longest_prefix <span class=\"token operator\">=<\/span> <span class=\"token function\">find_longest_prefix<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token comment\">\/\/printf(\"Longest Prefix = %s\\n\", longest_prefix);<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>longest_prefix<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token function\">free<\/span><span class=\"token punctuation\">(<\/span>longest_prefix<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token comment\">\/\/ \u8ddf\u8e2a\u5728\u5b57\u5178\u6811\u4e2d\u7684\u4f4d\u7f6e<\/span>\r\n    <span class=\"token keyword\">int<\/span> i<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> longest_prefix<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span> position <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> longest_prefix<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u7ee7\u7eed\u79fb\u52a8\u5230\u516c\u5171\u524d\u7f00\u4e2d\u7684\u6700\u6df1\u8282\u70b9<\/span>\r\n            temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u6ca1\u6709\u8fd9\u6837\u7684\u8282\u70b9\u3002\u76f4\u63a5\u8fd4\u56de\u3002<\/span>\r\n            <span class=\"token function\">free<\/span><span class=\"token punctuation\">(<\/span>longest_prefix<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token comment\">\/\/ \u73b0\u5728\uff0c\u6211\u4eec\u5df2\u7ecf\u5230\u8fbe\u4e24\u4e2a\u5b57\u7b26\u4e32\u4e4b\u95f4\u7684\u6700\u6df1\u516c\u5171\u8282\u70b9\u3002<\/span>\r\n    <span class=\"token comment\">\/\/ \u6211\u4eec\u9700\u8981\u5220\u9664\u5bf9\u5e94\u4e8e\u5355\u8bcd\u7684\u5e8f\u5217<\/span>\r\n    <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">=<\/span> <span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> len<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span> position <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u5220\u9664\u5269\u4f59\u7684\u5e8f\u5217<\/span>\r\n            TrieNode<span class=\"token operator\">*<\/span> rm_node <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n            temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token function\">free_trienode<\/span><span class=\"token punctuation\">(<\/span>rm_node<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token function\">free<\/span><span class=\"token punctuation\">(<\/span>longest_prefix<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u7684\u4ee3\u7801\u7b80\u5355\u5730\u627e\u5230\u4e86\u524d\u7f00\u5339\u914d\u7684\u6700\u6df1\u8282\u70b9\uff0c\u5e76\u4ece\u5b57\u5178\u6811\u4e2d\u5220\u9664\u5269\u4f59\u5339\u914d\u7684\u5355\u8bcd\u5e8f\u5217\uff0c\u56e0\u4e3a\u8fd9\u4e0e\u4efb\u4f55\u5176\u4ed6\u7684\u5339\u914d\u65e0\u5173\u3002<\/p>\n<h2>\u4e0a\u8ff0\u8fc7\u7a0b\u7684\u65f6\u95f4\u590d\u6742\u5ea6<\/h2>\n<h3>\u5b57\u5178\u6811\u64cd\u4f5c\u7684\u65f6\u95f4\u590d\u6742\u5ea6<\/h3>\n<div class=\"post-table\">\n<table>\n<thead>\n<tr>\n<th><strong>\u64cd\u4f5c<\/strong><\/th>\n<th><strong>\u65f6\u95f4\u590d\u6742\u5ea6<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code>search_trie()<\/code><\/td>\n<td><strong>O(n)<\/strong> &#8211; \u5176\u4e2d <strong>n<\/strong> \u662f\u8f93\u5165\u5b57\u7b26\u4e32\u7684\u957f\u5ea6<\/td>\n<\/tr>\n<tr>\n<td><code>insert_trie()<\/code><\/td>\n<td><strong>O(n)<\/strong> &#8211; \u5176\u4e2d <strong>n<\/strong> \u662f\u8f93\u5165\u5b57\u7b26\u4e32\u7684\u957f\u5ea6<\/td>\n<\/tr>\n<tr>\n<td><code>delete_trie()<\/code><\/td>\n<td><strong>O(C*n)<\/strong> &#8211; \u5176\u4e2d <strong>C<\/strong> \u662f\u5b57\u6bcd\u8868\u4e2d\u7684\u5b57\u6bcd\u6570\u91cf\uff0c<\/td>\n<\/tr>\n<tr>\n<td><strong>n<\/strong> \u662f\u8f93\u5165\u5355\u8bcd\u7684\u957f\u5ea6<\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u51e0\u4e4e\u6240\u6709\u60c5\u51b5\u4e0b\uff0c\u5b57\u6bcd\u7684\u6570\u91cf\u662f\u6052\u5b9a\u7684\uff0c\u56e0\u6b64 delete_trie() \u7684\u590d\u6742\u5ea6\u4e5f\u88ab\u964d\u4f4e\u5230 O(n)\u3002<\/p>\n<hr \/>\n<h2>\u5b57\u5178\u6811\u6570\u636e\u7ed3\u6784\u7684\u5b8c\u6574C\/C++\u7a0b\u5e8f<\/h2>\n<p>\u6700\u7ec8\uff0c\u6211\u4eec\uff08\u5e0c\u671b\u5982\u6b64\uff09\u5b8c\u6210\u4e86delete_trie()\u51fd\u6570\u3002\u8ba9\u6211\u4eec\u4f7f\u7528\u6211\u4eec\u7684\u9a71\u52a8\u7a0b\u5e8f\u6765\u68c0\u67e5\u6211\u4eec\u6240\u7f16\u5199\u7684\u662f\u5426\u6b63\u786e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span>\r\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdlib.h&gt;<\/span><\/span>\r\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string.h&gt;<\/span><\/span>\r\n\r\n<span class=\"token comment\">\/\/ \u6bcf\u4e2a\u8282\u70b9\u7684\u5b50\u8282\u70b9\u6570\u91cf<\/span>\r\n<span class=\"token comment\">\/\/ \u6211\u4eec\u5c06\u6784\u5efa\u4e00\u4e2aN\u53c9\u6811\u5e76\u4f7f\u5176\u6210\u4e3aTrie<\/span>\r\n<span class=\"token comment\">\/\/ \u7531\u4e8e\u6211\u4eec\u670926\u4e2a\u82f1\u6587\u5b57\u6bcd\uff0c\u6bcf\u4e2a\u8282\u70b9\u9700\u8981<\/span>\r\n<span class=\"token comment\">\/\/ 26\u4e2a\u5b50\u8282\u70b9<\/span>\r\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">N<\/span> <span class=\"token expression\"><span class=\"token number\">26<\/span><\/span><\/span>\r\n\r\n<span class=\"token keyword\">typedef<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">TrieNode<\/span> TrieNode<span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">TrieNode<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ Trie\u8282\u70b9\u7ed3\u6784<\/span>\r\n    <span class=\"token comment\">\/\/ \u6bcf\u4e2a\u8282\u70b9\u6709N\u4e2a\u5b50\u8282\u70b9\uff0c\u4ece\u6839\u8282\u70b9\u5f00\u59cb<\/span>\r\n    <span class=\"token comment\">\/\/ \u4ee5\u53ca\u4e00\u4e2a\u6807\u5fd7\u6765\u68c0\u67e5\u5b83\u662f\u5426\u662f\u53f6\u8282\u70b9<\/span>\r\n    <span class=\"token keyword\">char<\/span> data<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u4ec5\u7528\u4e8e\u6253\u5370\u76ee\u7684\u800c\u5b58\u50a8<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> children<span class=\"token punctuation\">[<\/span>N<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">int<\/span> is_leaf<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\nTrieNode<span class=\"token operator\">*<\/span> <span class=\"token function\">make_trienode<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span> data<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u4e3aTrieNode\u5206\u914d\u5185\u5b58<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> node <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token function\">calloc<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&lt;<\/span>N<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span>\r\n        node<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span>\r\n    node<span class=\"token operator\">-&gt;<\/span>is_leaf <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n    node<span class=\"token operator\">-&gt;<\/span>data <span class=\"token operator\">=<\/span> data<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> node<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">free_trienode<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> node<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u91ca\u653etrienode\u5e8f\u5217<\/span>\r\n    <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&lt;<\/span>N<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>node<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token function\">free_trienode<\/span><span class=\"token punctuation\">(<\/span>node<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token function\">free<\/span><span class=\"token punctuation\">(<\/span>node<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\nTrieNode<span class=\"token operator\">*<\/span> <span class=\"token function\">insert_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u5c06\u5355\u8bcd\u63d2\u5165\u5230Trie\u4e2d<\/span>\r\n    <span class=\"token comment\">\/\/ \u5047\u8bbe\uff1a\u5355\u8bcd\u53ea\u5305\u542b\u5c0f\u5199\u5b57\u7b26<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token comment\">\/\/ \u83b7\u53d6\u5b57\u6bcd\u8868\u4e2d\u7684\u76f8\u5bf9\u4f4d\u7f6e<\/span>\r\n        <span class=\"token keyword\">int<\/span> idx <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u5982\u679c\u76f8\u5e94\u7684\u5b50\u8282\u70b9\u4e0d\u5b58\u5728\uff0c<\/span>\r\n            <span class=\"token comment\">\/\/ \u53ea\u9700\u521b\u5efa\u8be5\u5b50\u8282\u70b9\uff01<\/span>\r\n            temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token function\">make_trienode<\/span><span class=\"token punctuation\">(<\/span>word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u4ec0\u4e48\u90fd\u4e0d\u505a\u3002\u8282\u70b9\u5df2\u7ecf\u5b58\u5728<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token comment\">\/\/ \u5411\u4e0b\u4e00\u7ea7\uff0c\u5230idx\u5f15\u7528\u7684\u5b50\u8282\u70b9<\/span>\r\n        <span class=\"token comment\">\/\/ \u56e0\u4e3a\u6211\u4eec\u6709\u524d\u7f00\u5339\u914d<\/span>\r\n        temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token comment\">\/\/ \u5728\u5355\u8bcd\u7684\u672b\u5c3e\uff0c\u5c06\u6b64\u8282\u70b9\u6807\u8bb0\u4e3a\u53f6\u8282\u70b9<\/span>\r\n    temp<span class=\"token operator\">-&gt;<\/span>is_leaf <span class=\"token operator\">=<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">search_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u5728Trie\u4e2d\u641c\u7d22\u5355\u8bcd<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token operator\">!=<\/span><span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span>\r\n    <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span> position <span class=\"token operator\">=<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span>\r\n            <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n        temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp <span class=\"token operator\">!=<\/span> <span class=\"token constant\">NULL<\/span> <span class=\"token operator\">&amp;&amp;<\/span> temp<span class=\"token operator\">-&gt;<\/span>is_leaf <span class=\"token operator\">==<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">check_divergence<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u68c0\u67e5\u5355\u8bcd\u7684\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u662f\u5426\u6709\u5206\u652f<\/span>\r\n    <span class=\"token comment\">\/\/ \u5e76\u8fd4\u56de\u5355\u8bcd\u4e2d\u51fa\u73b0\u5206\u652f\u7684\u6700\u5927\u4f4d\u7f6e<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">=<\/span> <span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>len <span class=\"token operator\">==<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token comment\">\/\/ \u6211\u4eec\u5c06\u8fd4\u56de\u51fa\u73b0\u5206\u652f\u7684\u6700\u5927\u7d22\u5f15<\/span>\r\n    <span class=\"token keyword\">int<\/span> last_index <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> len<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span> position <span class=\"token operator\">=<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u5982\u679c\u8be5\u4f4d\u7f6e\u5b58\u5728\u5b50\u8282\u70b9<\/span>\r\n            <span class=\"token comment\">\/\/ \u6211\u4eec\u5c06\u68c0\u67e5\u662f\u5426\u5b58\u5728\u4efb\u4f55\u5176\u4ed6\u5b50\u8282\u70b9<\/span>\r\n            <span class=\"token comment\">\/\/ \u4ee5\u4fbf\u53d1\u751f\u5206\u652f<\/span>\r\n            <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> j<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">&lt;<\/span>N<span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>j <span class=\"token operator\">!=<\/span> position <span class=\"token operator\">&amp;&amp;<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n                    <span class=\"token comment\">\/\/ \u6211\u4eec\u627e\u5230\u4e86\u53e6\u4e00\u4e2a\u5b50\u8282\u70b9\uff01\u8fd9\u662f\u4e00\u4e2a\u5206\u652f\u3002<\/span>\r\n                    <span class=\"token comment\">\/\/ \u66f4\u65b0\u5206\u652f\u4f4d\u7f6e<\/span>\r\n                    last_index <span class=\"token operator\">=<\/span> i <span class=\"token operator\">+<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>\r\n                    <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span>\r\n                <span class=\"token punctuation\">}<\/span>\r\n            <span class=\"token punctuation\">}<\/span>\r\n            <span class=\"token comment\">\/\/ \u8f6c\u5230\u5e8f\u5217\u4e2d\u7684\u4e0b\u4e00\u4e2a\u5b50\u8282\u70b9<\/span>\r\n            temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token keyword\">return<\/span> last_index<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> <span class=\"token function\">find_longest_prefix<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u5728Trie\u4e2d\u67e5\u627e\u5355\u8bcd\u7684\u6700\u957f\u516c\u5171\u524d\u7f00\u5b50\u4e32<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>word <span class=\"token operator\">||<\/span> word<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token comment\">\/\/ \u6700\u957f\u524d\u7f00\u7684\u957f\u5ea6<\/span>\r\n    <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">=<\/span> <span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token comment\">\/\/ \u6211\u4eec\u6700\u521d\u5c06\u6700\u957f\u524d\u7f00\u8bbe\u7f6e\u4e3a\u5355\u8bcd\u672c\u8eab\uff0c<\/span>\r\n    <span class=\"token comment\">\/\/ \u5e76\u5c1d\u8bd5\u4ece\u6700\u6df1\u4f4d\u7f6e\u56de\u6eaf<\/span>\r\n    <span class=\"token comment\">\/\/ \u5230\u4e00\u4e2a\u5206\u6b67\u70b9\uff0c\u5982\u679c\u5b58\u5728\u7684\u8bdd<\/span>\r\n    <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> longest_prefix <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token function\">calloc<\/span> <span class=\"token punctuation\">(<\/span>len <span class=\"token operator\">+<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span>\r\n        longest_prefix<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    longest_prefix<span class=\"token punctuation\">[<\/span>len<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token comment\">\/\/ \u5982\u679c\u4ece\u6839\u8282\u70b9\u6ca1\u6709\u5206\u652f\uff0c\u8fd9\u610f\u5473\u7740<\/span>\r\n    <span class=\"token comment\">\/\/ \u6211\u4eec\u6b63\u5728\u5339\u914d\u539f\u59cb\u5b57\u7b26\u4e32\uff01<\/span>\r\n    <span class=\"token comment\">\/\/ \u8fd9\u4e0d\u662f\u6211\u4eec\u60f3\u8981\u7684\uff01<\/span>\r\n    <span class=\"token keyword\">int<\/span> branch_idx  <span class=\"token operator\">=<\/span> <span class=\"token function\">check_divergence<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> longest_prefix<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>branch_idx <span class=\"token operator\">&gt;=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token comment\">\/\/ \u5b58\u5728\u5206\u652f\uff0c\u6211\u4eec\u5fc5\u987b\u66f4\u65b0\u4f4d\u7f6e<\/span>\r\n        <span class=\"token comment\">\/\/ \u5230\u6700\u957f\u5339\u914d\u5e76\u66f4\u65b0\u6700\u957f\u524d\u7f00<\/span>\r\n        <span class=\"token comment\">\/\/ \u901a\u8fc7\u5206\u652f\u7d22\u5f15\u957f\u5ea6<\/span>\r\n        longest_prefix<span class=\"token punctuation\">[<\/span>branch_idx<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span>\r\n        longest_prefix <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token function\">realloc<\/span> <span class=\"token punctuation\">(<\/span>longest_prefix<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>branch_idx <span class=\"token operator\">+<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token keyword\">return<\/span> longest_prefix<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">is_leaf_node<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u68c0\u67e5\u5355\u8bcd\u548c\u6839\u8282\u70b9\u7684\u524d\u7f00\u5339\u914d<\/span>\r\n    <span class=\"token comment\">\/\/ \u662f\u5426\u662f\u53f6\u8282\u70b9<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span> position <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token keyword\">return<\/span> temp<span class=\"token operator\">-&gt;<\/span>is_leaf<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\nTrieNode<span class=\"token operator\">*<\/span> <span class=\"token function\">delete_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u53ea\u6709\u5f53\u5355\u8bcd\u5e8f\u5217\u4ee5\u53f6\u8282\u70b9\u7ed3\u675f\u65f6\uff0c<\/span>\r\n    <span class=\"token comment\">\/\/ \u624d\u4f1a\u5c1d\u8bd5\u4eceTrie\u4e2d\u5220\u9664\u5b83<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>root<span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>word <span class=\"token operator\">||<\/span> word<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token comment\">\/\/ \u5982\u679c\u5bf9\u5e94\u4e8e\u5339\u914d\u7684\u8282\u70b9\u4e0d\u662f\u53f6\u8282\u70b9\uff0c<\/span>\r\n    <span class=\"token comment\">\/\/ \u6211\u4eec\u505c\u6b62<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token function\">is_leaf_node<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token comment\">\/\/ \u67e5\u627e\u4e0d\u662f\u5f53\u524d\u5355\u8bcd\u7684\u6700\u957f\u524d\u7f00\u5b57\u7b26\u4e32<\/span>\r\n    <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> longest_prefix <span class=\"token operator\">=<\/span> <span class=\"token function\">find_longest_prefix<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token comment\">\/\/printf(\"Longest Prefix = %s\\n\", longest_prefix);<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>longest_prefix<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token function\">free<\/span><span class=\"token punctuation\">(<\/span>longest_prefix<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token comment\">\/\/ \u8ddf\u8e2a\u5728Trie\u4e2d\u7684\u4f4d\u7f6e<\/span>\r\n    <span class=\"token keyword\">int<\/span> i<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> longest_prefix<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span> position <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> longest_prefix<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u7ee7\u7eed\u79fb\u52a8\u5230\u516c\u5171\u524d\u7f00\u4e2d\u7684\u6700\u6df1\u8282\u70b9<\/span>\r\n            temp <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u6ca1\u6709\u8fd9\u6837\u7684\u8282\u70b9\u3002\u53ea\u9700\u8fd4\u56de\u3002<\/span>\r\n            <span class=\"token function\">free<\/span><span class=\"token punctuation\">(<\/span>longest_prefix<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token comment\">\/\/ \u73b0\u5728\uff0c\u6211\u4eec\u5df2\u7ecf\u5230\u8fbe\u4e24\u4e2a\u5b57\u7b26\u4e32\u4e4b\u95f4\u6700\u6df1\u7684\u516c\u5171\u8282\u70b9\u3002<\/span>\r\n    <span class=\"token comment\">\/\/ \u6211\u4eec\u9700\u8981\u5220\u9664\u5bf9\u5e94\u4e8e\u5355\u8bcd\u7684\u5e8f\u5217<\/span>\r\n    <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">=<\/span> <span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> len<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span> position <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> word<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">-<\/span> <span class=\"token char\">'a'<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ \u5220\u9664\u5269\u4f59\u7684\u5e8f\u5217<\/span>\r\n            TrieNode<span class=\"token operator\">*<\/span> rm_node <span class=\"token operator\">=<\/span> temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n            temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>position<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token function\">free_trienode<\/span><span class=\"token punctuation\">(<\/span>rm_node<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token function\">free<\/span><span class=\"token punctuation\">(<\/span>longest_prefix<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> root<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">print_trie<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ \u6253\u5370trie\u7684\u8282\u70b9<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>root<span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> temp <span class=\"token operator\">=<\/span> root<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"%c -&gt; \"<\/span><span class=\"token punctuation\">,<\/span> temp<span class=\"token operator\">-&gt;<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&lt;<\/span>N<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token function\">print_trie<\/span><span class=\"token punctuation\">(<\/span>temp<span class=\"token operator\">-&gt;<\/span>children<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> \r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>TrieNode<span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u67e5\u627e %s: \"<\/span><span class=\"token punctuation\">,<\/span> word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">search_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">==<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u672a\u627e\u5230\\n\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">else<\/span>\r\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u5df2\u627e\u5230\uff01\\n\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token comment\">\/\/ Trie\u6570\u636e\u7ed3\u6784\u64cd\u4f5c\u7684\u9a71\u52a8\u7a0b\u5e8f<\/span>\r\n    TrieNode<span class=\"token operator\">*<\/span> root <span class=\"token operator\">=<\/span> <span class=\"token function\">make_trienode<\/span><span class=\"token punctuation\">(<\/span><span class=\"token char\">'\\0'<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    root <span class=\"token operator\">=<\/span> <span class=\"token function\">insert_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"hello\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    root <span class=\"token operator\">=<\/span> <span class=\"token function\">insert_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"hi\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    root <span class=\"token operator\">=<\/span> <span class=\"token function\">insert_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"teabag\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    root <span class=\"token operator\">=<\/span> <span class=\"token function\">insert_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"teacan\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"tea\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"teabag\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"teacan\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"hi\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"hey\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_search<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"hello\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\\n\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    root <span class=\"token operator\">=<\/span> <span class=\"token function\">delete_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"hello\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u5220\u9664 'hello' \u540e...\\n\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\\n\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    root <span class=\"token operator\">=<\/span> <span class=\"token function\">delete_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"teacan\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u5220\u9664 'teacan' \u540e...\\n\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">print_trie<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\\n\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token function\">free_trienode<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u7a0b\u5e8f\u8f93\u51fa<\/h3>\n<pre class=\"post-pre\"><code>\u67e5\u627e tea: \u672a\u627e\u5230\r\n\u67e5\u627e teabag: \u5df2\u627e\u5230\uff01\r\n\u67e5\u627e teacan: \u5df2\u627e\u5230\uff01\r\n\u67e5\u627e hi: \u5df2\u627e\u5230\uff01\r\n\u67e5\u627e hey: \u672a\u627e\u5230\r\n\u67e5\u627e hello: \u5df2\u627e\u5230\uff01\r\n -&gt; h -&gt; e -&gt; l -&gt; l -&gt; o -&gt; i -&gt; t -&gt; e -&gt; a -&gt; b -&gt; a -&gt; g -&gt; c -&gt; a -&gt; n -&gt; \r\n\u5220\u9664 'hello' \u540e...\r\n -&gt; h -&gt; i -&gt; t -&gt; e -&gt; a -&gt; b -&gt; a -&gt; g -&gt; c -&gt; a -&gt; n -&gt; \r\n\u5220\u9664 'teacan' \u540e...\r\n -&gt; h -&gt; i -&gt; t -&gt; e -&gt; a -&gt; b -&gt; a -&gt; g -&gt; \r\n<\/code><\/pre>\n<p>\u901a\u8fc7\u8fd9\u4e2a\u4f8b\u5b50\uff0c\u6211\u4eec\u5df2\u7ecf\u5b8c\u6210\u4e86\u5728C\/C++\u4e2d\u5b9e\u73b0Trie\u6570\u636e\u7ed3\u6784\u7684\u5b66\u4e60\u3002\u6211\u77e5\u9053\u8fd9\u662f\u4e00\u7bc7\u5f88\u957f\u7684\u9605\u8bfb\uff0c\u4f46\u5e0c\u671b\u4f60\u80fd\u6b63\u786e\u7406\u89e3\u5982\u4f55\u5e94\u7528\u8fd9\u4e9b\u65b9\u6cd5\uff01<\/p>\n<hr \/>\n<h2>\u4e0b\u8f7d\u8be5\u4ee3\u7801<\/h2>\n<p>\u8fd9\u662f\u6587\u7ae0\u300aC\/C++\u4e2d\u7684\u5b57\u5178\u6811\u6570\u636e\u7ed3\u6784\u300b\u7684\u7b2c7\u90e8\u5206\uff08\u51717\u90e8\u5206\uff09\u3002<\/p>\n<p>\u5185\u5bb9\u7247\u6bb5: \u4f60\u53ef\u4ee5\u5728\u6211\u4e0a\u4f20\u5230Github\u4ee3\u7801\u7247\u6bb5\u4e0a\u627e\u5230\u5b8c\u6574\u7684\u4ee3\u7801\u3002\u5b83\u53ef\u80fd\u4e0d\u662f\u6700\u9ad8\u6548\u7684\u4ee3\u7801\uff0c\u4f46\u6211\u5df2\u5c3d\u529b\u786e\u4fdd\u5b83\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n<p>\u5982\u679c\u4f60\u6709\u4efb\u4f55\u95ee\u9898\u6216\u5efa\u8bae\uff0c\u6b22\u8fce\u5728\u4e0b\u65b9\u7684\u8bc4\u8bba\u533a\u63d0\u51fa\uff01<\/p>\n<hr \/>\n<h2>\u53c2\u8003\u8d44\u6599<\/h2>\n<ul class=\"post-ul\">\n<li>\u7ef4\u57fa\u767e\u79d1\u5173\u4e8e\u5b57\u5178\u6811\u7684\u6587\u7ae0<\/li>\n<\/ul>\n<hr \/>\n<h2>\u63a8\u8350\u9605\u8bfb<\/h2>\n<p>\u5982\u679c\u4f60\u5bf9\u7c7b\u4f3c\u7684\u8bdd\u9898\u611f\u5174\u8da3\uff0c\u53ef\u4ee5\u53c2\u8003\u300a\u6570\u636e\u7ed3\u6784\u548c\u7b97\u6cd5\u300b\u90e8\u5206\uff0c\u5176\u4e2d\u5305\u62ec\u54c8\u5e0c\u8868\u548c\u56fe\u8bba\u7b49\u4e3b\u9898\u3002<\/p>\n<hr \/>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aC\/C++\u4e2d\u7684\u5b57\u5178\u6811\u6570\u636e\u7ed3\u6784\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51717\u90e8\u5206\uff09\u3002 \u5b57\u5178\u6811\uff08Trie\uff09\u6570\u636e\u7ed3\u6784\u4f5c\u4e3a\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\u7684 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1210,2117,2116,252,786],"class_list":["post-795","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c-c","tag-trie","tag-2116","tag-252","tag-786"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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