{"id":576,"date":"2023-09-08T04:37:41","date_gmt":"2022-11-05T15:47:52","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e5%9c%a8c%e6%a0%87%e5%87%86%e5%ba%93%e4%b8%ad%e4%bd%bf%e7%94%a8sort%e5%87%bd%e6%95%b0\/"},"modified":"2025-08-02T19:53:37","modified_gmt":"2025-08-02T11:53:37","slug":"%e5%9c%a8c%e6%a0%87%e5%87%86%e5%ba%93%e4%b8%ad%e4%bd%bf%e7%94%a8sort%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8c%e6%a0%87%e5%87%86%e5%ba%93%e4%b8%ad%e4%bd%bf%e7%94%a8sort%e5%87%bd%e6%95%b0\/","title":{"rendered":"\u638c\u63e1C++\u6807\u51c6\u5e93sort()\u51fd\u6570\uff1a\u9ad8\u6548\u6392\u5e8f\u7684\u5b8c\u6574\u6559\u7a0b"},"content":{"rendered":"<h2>\u5f15\u8a00<\/h2>\n<p>\u55e8\uff01\u4eca\u5929\u6211\u4eec\u8981\u8ba8\u8bbaC++\u6807\u51c6\u5e93\u4e2d\u7684sort()\u51fd\u6570\u3002<\/p>\n<p>\u57fa\u7840\u6765\u8bf4\uff0c\u6392\u5e8f\u662f\u5bf9\u7269\u54c1\u8fdb\u884c\u7cfb\u7edf\u6392\u5e8f\u7684\u8fc7\u7a0b\u3002\u8fd9\u4e9b\u7269\u54c1\u53ef\u4ee5\u662f\u4e00\u4e2a\u5e8f\u5217\u7684\u5143\u7d20\u6216\u4efb\u4f55\u6570\u636e\u7ed3\u6784\u4e2d\u7684\u5143\u7d20\u3002<\/p>\n<p>\u5728C++\u4e2d\uff0c\u6807\u51c6\u5e93\u63d0\u4f9b\u4e86\u4e00\u4e2a\u9884\u5b9a\u4e49\u4e14\u53ef\u76f4\u63a5\u4f7f\u7528\u7684\u51fd\u6570sort()\u6765\u6267\u884c\u8fd9\u4e2a\u6392\u5e8f\u64cd\u4f5c\u3002\u6240\u4ee5\u8ba9\u6211\u4eec\u9a6c\u4e0a\u5f00\u59cb\u5427\u3002<\/p>\n<h2>C++ \u4e2d\u7684 std::sort() \u51fd\u6570<\/h2>\n<p>C++\u4e2d\u7684std::sort()\u51fd\u6570\u662f\u5185\u5efa\u51fd\u6570\uff0c\u7528\u4e8e\u6309\u7279\u5b9a\u987a\u5e8f\u5bf9\u4efb\u610f\u5f62\u5f0f\u7684\u6570\u636e\u7ed3\u6784\u8fdb\u884c\u6392\u5e8f\u3002\u5b83\u5728algorithm\u5934\u6587\u4ef6\u4e2d\u88ab\u5b9a\u4e49\u3002sort()\u51fd\u6570\u7684\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">void<\/span> <span class=\"token function\">sort<\/span> <span class=\"token punctuation\">(<\/span>RandomAccessIterator first<span class=\"token punctuation\">,<\/span> RandomAccessIterator last<span class=\"token punctuation\">,<\/span> Compare comp<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u4e2a\u51fd\u6570\u6ca1\u6709\u8fd4\u56de\u4efb\u4f55\u503c\u3002\u5b83\u53ea\u662f\u66f4\u65b0\u4ece\u7b2c\u4e00\u4e2a\u5230\u6700\u540e\u4e00\u4e2a\u8fed\u4ee3\u5668\u6216\u4f4d\u7f6e\u7684\u5143\u7d20\/\u9879\u3002\u7b2c\u4e09\u4e2a\u53c2\u6570\uff08\u53ef\u9009\uff09comp\u5fc5\u987b\u662f\u4e00\u4e2a\u786e\u5b9a\u6392\u5e8f\u5143\u7d20\u987a\u5e8f\u7684\u51fd\u6570\u3002\u5f53\u672a\u6307\u5b9a\u65f6\uff0c\u9ed8\u8ba4\u6309\u5347\u5e8f\u6392\u5e8f\uff0c\u76f8\u5f53\u4e8e\u4f7f\u7528std::less()\u51fd\u6570\u3002<\/p>\n<p>sort()\u51fd\u6570\u4f7f\u7528\u4e00\u79cd\u540d\u4e3aIntrosort\u7684\u4e09\u5c42\u6df7\u5408\u6392\u5e8f\u6280\u672f\u3002\u5b83\u662f\u5feb\u901f\u6392\u5e8f\u3001\u5806\u6392\u5e8f\u548c\u63d2\u5165\u6392\u5e8f\u7684\u7ec4\u5408\u3002<\/p>\n<h2>\u5728C++\u4e2d\u4f7f\u7528sort()\u51fd\u6570\u5bf9\u6570\u636e\u8fdb\u884c\u6392\u5e8f<\/h2>\n<p>\u65e2\u7136\u6211\u4eec\u5df2\u7ecf\u638c\u63e1\u4e86sort()\u51fd\u6570\u7684\u57fa\u672c\u77e5\u8bc6\uff0c\u8ba9\u6211\u4eec\u5728\u6211\u4eec\u7684C++\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u5b83\u6765\u5bf9\u4e00\u4e9b\u6570\u636e\u7ed3\u6784\uff08\u4f8b\u5982\u6570\u7ec4\uff09\u8fdb\u884c\u6392\u5e8f\u5427\u3002<\/p>\n<h3>1. \u6309\u5347\u5e8f\u6392\u5217<\/h3>\n<p>\u5982\u524d\u6240\u8ff0\uff0c\u5982\u679c\u672a\u63d0\u53cacomp\u53c2\u6570\uff0c\u5219sort()\u51fd\u6570\u9ed8\u8ba4\u6309\u5347\u5e8f\u5bf9\u4e00\u7ec4\u9879\u76ee\u8fdb\u884c\u6392\u5e8f\u3002<\/p>\n<p>\u6240\u4ee5\u5bf9\u4e8e\u4e0b\u9762\u7684\u4f8b\u5b50\uff0c\u6211\u4eec\u4ec5\u4ec5\u4f20\u9012\u4e86\u7b2c\u4e00\u4e2a\uff08\u8d77\u59cb\uff09\u548c\u6700\u540e\u4e00\u4e2a\uff08\u7ed3\u675f\uff09\u53ef\u8fed\u4ee3\u5bf9\u8c61\u6765\u6309\u5347\u5e8f\u6392\u5e8f\u6570\u7ec4\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;iostream&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;algorithm&gt;<\/span><\/span>\r\n<span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\r\n<span class=\"token punctuation\">{<\/span>  \r\n    <span class=\"token comment\">\/\/\u6570\u7ec4\u521d\u59cb\u5316<\/span>\r\n    <span class=\"token keyword\">int<\/span> demo<span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n    \r\n    <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">=<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>demo<span class=\"token punctuation\">)<\/span><span class=\"token operator\">\/<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>demo<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n     \r\n    cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\"\u6392\u5e8f\u524d\u6570\u7ec4 : \"<\/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>\r\n    <span class=\"token punctuation\">{<\/span>\r\n        cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\" \"<\/span><span class=\"token operator\">&lt;&lt;<\/span>demo<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n     \r\n    std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span>demo<span class=\"token punctuation\">,<\/span> demo <span class=\"token operator\">+<\/span> len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u5bf9demo\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f<\/span>\r\n     \r\n    cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\"\\n\\n\u6392\u5e8f\u540e\u6570\u7ec4 : \"<\/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>\r\n    <span class=\"token punctuation\">{<\/span>\r\n        cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\" \"<\/span><span class=\"token operator\">&lt;&lt;<\/span>demo<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <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>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"C++ sort()\u51fd\u6570\u5347\u5e8f\u6392\u5e8f\u7ed3\u679c\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65647613a4b2f92e6c72a66d\/16-0.png\" alt=\"C++ sort()\u51fd\u6570\u5347\u5e8f\u6392\u5e8f\u7ed3\u679c\" \/><\/div>\n<p>\u5728\u8fd9\u91cc\uff0cdemo\u662f\u7ed9\u5b9a\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u5730\u5740\uff0c(demo + len)\u662f\u7ed9\u5b9a\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u5730\u5740\u3002\u56e0\u6b64\uff0c\u5047\u8bbecomp\u51fd\u6570\u9ed8\u8ba4\u4e3astd::less()\u51fd\u6570\uff0csort()\u51fd\u6570\u5c06\u6309\u7167\u5347\u5e8f\u5bf9\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f\u3002<\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong>std::less() \u51fd\u6570\u6bd4\u8f83\u4e24\u4e2a\u53c2\u6570\uff0c\u5e76\u6839\u636e\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u5426\u5c0f\u4e8e\u7b2c\u4e8c\u4e2a\u53c2\u6570\u8fd4\u56de true \u6216 false\u3002<\/p>\n<h3>2. \u6309\u964d\u5e8f\u6392\u5e8f<\/h3>\n<p>\u6211\u4eec\u8fd8\u53ef\u4ee5\u901a\u8fc7\u64cd\u4f5c\u7b2c\u4e09\u4e2a\u53c2\u6570\uff0c\u4f7f\u7528sort()\u51fd\u6570\u5bf9\u6570\u636e\u7ed3\u6784\u8fdb\u884c\u964d\u5e8f\u6392\u5e8f\u3002\u8ba9\u6211\u4eec\u770b\u770b\u5982\u4f55\u64cd\u4f5c\u3002<\/p>\n<p>\u5728\u4e0b\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86std::greater()\u51fd\u6570\uff0c\u5b83\u7684\u529f\u80fd\u4e0estd::less()\u51fd\u6570\u5b8c\u5168\u76f8\u53cd\u3002\u5b83\u6bd4\u8f83\u4e24\u4e2a\u53c2\u6570\u5e76\u5728\u7b2c\u4e00\u4e2a\u53c2\u6570\u5927\u4e8e\u53e6\u4e00\u4e2a\u53c2\u6570\u65f6\u8fd4\u56detrue\uff0c\u5426\u5219\u8fd4\u56defalse\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;iostream&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;algorithm&gt;<\/span><\/span>\r\n<span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\r\n<span class=\"token punctuation\">{<\/span>  \r\n    <span class=\"token comment\">\/\/ \u6570\u7ec4\u521d\u59cb\u5316<\/span>\r\n    <span class=\"token keyword\">int<\/span> demo<span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">44<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">22<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">55<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">33<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">66<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n    \r\n    <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">=<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>demo<span class=\"token punctuation\">)<\/span><span class=\"token operator\">\/<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>demo<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n     \r\n    cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\"\u6392\u5e8f\u524d\u7684\u6570\u7ec4\uff1a\"<\/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>\r\n    <span class=\"token punctuation\">{<\/span>\r\n        cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\" \"<\/span><span class=\"token operator\">&lt;&lt;<\/span>demo<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n     \r\n    std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span>demo<span class=\"token punctuation\">,<\/span> demo <span class=\"token operator\">+<\/span> len<span class=\"token punctuation\">,<\/span> <span class=\"token generic-function\"><span class=\"token function\">greater<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ \u5bf9demo\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f<\/span>\r\n     \r\n    cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\"\\n\\n\u6392\u5e8f\u540e\u7684\u6570\u7ec4\uff1a\"<\/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>\r\n    <span class=\"token punctuation\">{<\/span>\r\n        cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\" \"<\/span><span class=\"token operator\">&lt;&lt;<\/span>demo<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <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>\u5982\u4e0b\u6240\u793a\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u5c06lambda\u51fd\u6570\u4f5c\u4e3asort()\u51fd\u6570\u7684\u7b2c\u4e09\u4e2a\u53c2\u6570\u4f7f\u7528\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;iostream&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;algorithm&gt;<\/span><\/span>\r\n<span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\r\n<span class=\"token punctuation\">{<\/span>  \r\n    <span class=\"token comment\">\/\/ \u6570\u7ec4\u521d\u59cb\u5316<\/span>\r\n    <span class=\"token keyword\">int<\/span> demo<span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">44<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">22<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">55<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">33<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">66<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n    \r\n    <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">=<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>demo<span class=\"token punctuation\">)<\/span><span class=\"token operator\">\/<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>demo<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n     \r\n    cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\"\u6392\u5e8f\u524d\u7684\u6570\u7ec4\uff1a\"<\/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>\r\n    <span class=\"token punctuation\">{<\/span>\r\n        cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\" \"<\/span><span class=\"token operator\">&lt;&lt;<\/span>demo<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n     \r\n    std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span>demo<span class=\"token punctuation\">,<\/span> demo <span class=\"token operator\">+<\/span> len<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> <span class=\"token operator\">&amp;<\/span>e1<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token operator\">&amp;<\/span>e2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> e1<span class=\"token operator\">&gt;<\/span>e2<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ \u5bf9demo\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f<\/span>\r\n     \r\n    cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\"\\n\\n\u6392\u5e8f\u540e\u7684\u6570\u7ec4\uff1a\"<\/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>\r\n    <span class=\"token punctuation\">{<\/span>\r\n        cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\" \"<\/span><span class=\"token operator\">&lt;&lt;<\/span>demo<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <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>\u4e0a\u8ff0\u4e24\u4e2a\u4f8b\u5b50\u751f\u6210\u7684\u8f93\u51fa\u4e0e\u4e0b\u65b9\u7ed9\u51fa\u7684\u76f8\u540c\u3002\u5e76\u4e14\u6210\u529f\u5730\u6309\u964d\u5e8f\u6392\u5217\u4e86\u6f14\u793a\u6570\u7ec4\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"C++ sort()\u51fd\u6570\u964d\u5e8f\u6392\u5e8f\u7ed3\u679c\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65647613a4b2f92e6c72a66d\/27-0.png\" alt=\"C++ sort()\u51fd\u6570\u964d\u5e8f\u6392\u5e8f\u7ed3\u679c\" \/><\/div>\n<h3>3. \u4f7f\u7528\u7528\u6237\u81ea\u5b9a\u4e49\u7684\u987a\u5e8f\u8fdb\u884c\u6392\u5e8f<\/h3>\n<p>std::sort()\u51fd\u6570\u7684\u7b2c\u4e09\u4e2a\u53c2\u6570\uff08comp\uff09\u4e5f\u53ef\u4ee5\u662f\u4e00\u4e2a\u7528\u6237\u81ea\u5b9a\u4e49\u51fd\u6570\uff0c\u7528\u4e8e\u5b9a\u4e49\u6392\u5e8f\u7684\u987a\u5e8f\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u4e2a\u51fd\u6570\u5fc5\u987b\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff08True\/False\uff09\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5728\u4ee5\u4e0b\u4ee3\u7801\u7247\u6bb5\u4e2d\uff0c\u6211\u4eec\u5c1d\u8bd5\u6839\u636e\u5b83\u4eec\u88ab10\u9664\u65f6\u4ea7\u751f\u7684\u4f59\u6570\uff08\u4f7f\u7528&#8217;%&#8217;\u8fd0\u7b97\u7b26\uff09\u5bf9\u6570\u7ec4\u7684\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\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;iostream&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;algorithm&gt;<\/span><\/span>\r\n<span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token comment\">\/\/\u6211\u4eec\u7684\u81ea\u5b9a\u4e49\u51fd\u6570<\/span>\r\n<span class=\"token keyword\">bool<\/span> <span class=\"token function\">My_func<\/span><span class=\"token punctuation\">(<\/span> <span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> b<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token punctuation\">{<\/span>\t\r\n\t<span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span>a<span class=\"token operator\">%<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token punctuation\">(<\/span>b<span class=\"token operator\">%<\/span><span class=\"token number\">10<\/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>\r\n<span class=\"token punctuation\">{<\/span>  \r\n    <span class=\"token comment\">\/\/\u6570\u7ec4\u521d\u59cb\u5316<\/span>\r\n    <span class=\"token keyword\">int<\/span> demo<span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">18<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">45<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">34<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">92<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">21<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n    \r\n    <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">=<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>demo<span class=\"token punctuation\">)<\/span><span class=\"token operator\">\/<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>demo<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n     \r\n    cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\"\u6392\u5e8f\u524d\u7684\u6570\u7ec4\uff1a\"<\/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>\r\n    <span class=\"token punctuation\">{<\/span>\r\n        cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\" \"<\/span><span class=\"token operator\">&lt;&lt;<\/span>demo<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n     \r\n    std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span>demo<span class=\"token punctuation\">,<\/span> demo <span class=\"token operator\">+<\/span> len<span class=\"token punctuation\">,<\/span> My_func<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u5bf9demo\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f<\/span>\r\n     \r\n    cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\"\\n\\n\u6392\u5e8f\u540e\u7684\u6570\u7ec4\uff1a\"<\/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>\r\n    <span class=\"token punctuation\">{<\/span>\r\n        cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">\" \"<\/span><span class=\"token operator\">&lt;&lt;<\/span>demo<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <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><strong>\u8fd0\u884c\u7ed3\u679c\uff1a<\/strong><\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"C++\u4f7f\u7528\u81ea\u5b9a\u4e49\u51fd\u6570\u6392\u5e8f\u7ed3\u679c\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65647613a4b2f92e6c72a66d\/34-0.png\" alt=\"\u4f7f\u7528\u81ea\u5b9a\u4e49\u51fd\u6570\u8fdb\u884c\u6392\u5e8f\u7684\u7ed3\u679c\" \/><\/div>\n<p>\u4ece\u4e0a\u8ff0\u8f93\u51fa\u7ed3\u679c\u53ef\u4ee5\u6e05\u6670\u5730\u770b\u5230\uff0c\u901a\u8fc7\u6211\u4eec\u81ea\u5b9a\u4e49\u7684My_func()\u51fd\u6570\uff0c\u6f14\u793a\u6570\u7ec4\u5df2\u6210\u529f\u6309\u7167\u5143\u7d20\u5bf910\u53d6\u6a21(element%10)\u7684\u89c4\u5219\u8fdb\u884c\u4e86\u6392\u5e8f\u3002<\/p>\n<h2>C++\u4e2dstd::sort()\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u5206\u6790<\/h2>\n<p>std::sort()\u51fd\u6570\u5728\u5bf9N\u4e2a\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u65f6\uff0c\u5e73\u5747\u9700\u8981\u8fdb\u884cNlog(N)\u6b21\u6bd4\u8f83\u64cd\u4f5c\u3002\u56e0\u6b64\uff0c\u5728\u6700\u574f\u7684\u60c5\u51b5\u4e0b\uff0c\u5176\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(Nlog(N))\uff0c\u8fd9\u4f7f\u5f97C++\u6807\u51c6\u5e93\u4e2d\u7684sort()\u51fd\u6570\u6210\u4e3a\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u6392\u5e8f\u7684\u9ad8\u6548\u9009\u62e9\u3002<\/p>\n<h2>\u603b\u7ed3\u4e0e\u6269\u5c55<\/h2>\n<p>\u901a\u8fc7\u672c\u6559\u7a0b\uff0c\u6211\u4eec\u5168\u9762\u4e86\u89e3\u4e86C++\u6807\u51c6\u5e93\u4e2dsort()\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\u548c\u5de5\u4f5c\u539f\u7406\u3002\u5e0c\u671b\u8fd9\u4e9b\u5185\u5bb9\u80fd\u591f\u5e2e\u52a9\u60a8\u6e05\u695a\u5730\u7406\u89e3\u5982\u4f55\u5728\u5b9e\u9645\u7f16\u7a0b\u4e2d\u5e94\u7528\u8fd9\u4e00\u5f3a\u5927\u7684\u6392\u5e8f\u5de5\u5177\u3002<\/p>\n<p>\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0csort()\u51fd\u6570\u4e0d\u4ec5\u9002\u7528\u4e8e\u6570\u7ec4\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5176\u4ed6STL\u5bb9\u5668\uff0c\u5982\u5411\u91cf(vector)\u3001\u5217\u8868(list)\u7b49\u6570\u636e\u7ed3\u6784\u3002\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u9009\u62e9\u6570\u7ec4\u4f5c\u4e3a\u793a\u4f8b\u4e3b\u8981\u662f\u4e3a\u4e86\u4fbf\u4e8e\u521d\u5b66\u8005\u66f4\u597d\u5730\u7406\u89e3\u6392\u5e8f\u7684\u57fa\u672c\u6982\u5ff5\u3002<\/p>\n<p>\u5982\u679c\u60a8\u60f3\u6df1\u5165\u5b66\u4e60\u66f4\u591aC++\u7f16\u7a0b\u77e5\u8bc6\uff0c\u6211\u4eec\u5efa\u8bae\u60a8\u7ee7\u7eed\u6d4f\u89c8\u6211\u4eec\u7684C++\u6559\u7a0b\u7cfb\u5217\uff0c\u90a3\u91cc\u6709\u66f4\u591a\u5173\u4e8e\u6807\u51c6\u6a21\u677f\u5e93(STL)\u548c\u5176\u4ed6\u9ad8\u7ea7\u4e3b\u9898\u7684\u8be6\u7ec6\u8bb2\u89e3\u3002<\/p>\n<p>\u5982\u6709\u4efb\u4f55\u7591\u95ee\u6216\u9700\u8981\u8fdb\u4e00\u6b65\u8bf4\u660e\uff0c\u6b22\u8fce\u5728\u4e0b\u65b9\u8bc4\u8bba\u533a\u7559\u8a00\uff0c\u6211\u4eec\u5c06\u5c3d\u5feb\u4e3a\u60a8\u89e3\u7b54\u3002<\/p>\n<h2>\u53c2\u8003\u6587\u732e<\/h2>\n<ul class=\"post-ul\">\n<li>std::sort() &#8211; C++\u5b98\u65b9\u6587\u6863<\/li>\n<li>C++\u6807\u51c6\u6a21\u677f\u5e93(STL)\u8be6\u89e3<\/li>\n<li>C++\u7b97\u6cd5\u5e93\u53c2\u8003\u624b\u518c<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5f15\u8a00 \u55e8\uff01\u4eca\u5929\u6211\u4eec\u8981\u8ba8\u8bbaC++\u6807\u51c6\u5e93\u4e2d\u7684sort()\u51fd\u6570\u3002 \u57fa\u7840\u6765\u8bf4\uff0c\u6392\u5e8f\u662f\u5bf9\u7269\u54c1\u8fdb\u884c\u7cfb\u7edf\u6392\u5e8f\u7684\u8fc7\u7a0b\u3002\u8fd9\u4e9b\u7269\u54c1 [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1659,1662,1660,743,1661],"class_list":{"0":"post-576","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-uncategorized","7":"tag-c-sort","8":"tag-c-","10":"tag-stl","11":"tag-1661"},"yoast_head":"<!-- This site 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