{"id":23276,"date":"2024-03-16T01:06:53","date_gmt":"2024-03-16T01:06:53","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/check-whether-a-string-is-a-palindrome-in-the-c-language\/"},"modified":"2024-03-22T00:52:57","modified_gmt":"2024-03-22T00:52:57","slug":"check-whether-a-string-is-a-palindrome-in-the-c-language","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/check-whether-a-string-is-a-palindrome-in-the-c-language\/","title":{"rendered":"Check whether a string is a palindrome in the C language."},"content":{"rendered":"<p>A palindrome string is one that reads the same from left to right as it does from right to left. By using two pointers, one pointing to the beginning of the string and the other to the end, you can compare the characters they point to. If they are not the same, it is not a palindrome. If they are the same, the pointers move towards the middle to continue comparing. When the two pointers meet, it means the entire string has been compared without any mismatched characters, thus confirming it is a palindrome.<\/p>\n<p>Here is a code in C language that checks if a given string is a palindrome.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdio.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;string.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">isPalindrome<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">char<\/span> str[])<\/span> {\r\n    <span class=\"hljs-type\">int<\/span> length = <span class=\"hljs-built_in\">strlen<\/span>(str);\r\n    <span class=\"hljs-type\">int<\/span> i, j;\r\n    \r\n    <span class=\"hljs-keyword\">for<\/span> (i = <span class=\"hljs-number\">0<\/span>, j = length - <span class=\"hljs-number\">1<\/span>; i &lt; j; i++, j--) {\r\n        <span class=\"hljs-keyword\">if<\/span> (str[i] != str[j]) {\r\n            <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>; <span class=\"hljs-comment\">\/\/ \u4e0d\u662f\u56de\u6587\u5b57\u7b26\u4e32<\/span>\r\n        }\r\n    }\r\n    \r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">1<\/span>; <span class=\"hljs-comment\">\/\/ \u662f\u56de\u6587\u5b57\u7b26\u4e32<\/span>\r\n}\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">()<\/span> {\r\n    <span class=\"hljs-type\">char<\/span> str[<span class=\"hljs-number\">100<\/span>];\r\n    \r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"\u8bf7\u8f93\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32\uff1a\"<\/span>);\r\n    <span class=\"hljs-built_in\">scanf<\/span>(<span class=\"hljs-string\">\"%s\"<\/span>, str);\r\n    \r\n    <span class=\"hljs-keyword\">if<\/span> (isPalindrome(str)) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"%s \u662f\u56de\u6587\u5b57\u7b26\u4e32\\n\"<\/span>, str);\r\n    } <span class=\"hljs-keyword\">else<\/span> {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"%s \u4e0d\u662f\u56de\u6587\u5b57\u7b26\u4e32\\n\"<\/span>, str);\r\n    }\r\n    \r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>Example input:<\/p>\n<pre class=\"post-pre\"><code>\u8bf7\u8f93\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32\uff1alevel\r\n<\/code><\/pre>\n<p>Output example:<\/p>\n<pre class=\"post-pre\"><code>level \u662f\u56de\u6587\u5b57\u7b26\u4e32\r\n<\/code><\/pre>\n<p>Input example:<\/p>\n<pre class=\"post-pre\"><code>\u8bf7\u8f93\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32\uff1ahello\r\n<\/code><\/pre>\n<p>Output example:<\/p>\n<pre class=\"post-pre\"><code>hello \u4e0d\u662f\u56de\u6587\u5b57\u7b26\u4e32\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>A palindrome string is one that reads the same from left to right as it does from right to left. By using two pointers, one pointing to the beginning of the string and the other to the end, you can compare the characters they point to. If they are not the same, it is not [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-23276","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Check whether a string is a palindrome in the C language. - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/check-whether-a-string-is-a-palindrome-in-the-c-language\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Check whether a string is a palindrome in the C language.\" \/>\n<meta property=\"og:description\" content=\"A palindrome string is one that reads the same from left to right as it does from right to left. 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