{"id":13882,"date":"2024-03-15T08:03:33","date_gmt":"2024-03-15T08:03:33","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/"},"modified":"2025-08-06T00:42:51","modified_gmt":"2025-08-06T00:42:51","slug":"how-to-compare-the-size-of-strings-using-strcmp-in-c","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/","title":{"rendered":"C++ strcmp: Compare String Size Guide"},"content":{"rendered":"<p>In C++, you can use the strcmp function to compare the size of two strings. This function is a standard library function in C and is used to compare whether two strings are equal or their size relationship.<\/p>\n<p>The prototype of the strcmp function is as follows:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">strcmp<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">char<\/span>* str1, <span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">char<\/span>* str2)<\/span><\/span>;\r\n<\/code><\/pre>\n<p>The function takes two parameters, which are the two strings str1 and str2 to be compared. It returns an integer value indicating the relationship in size between the two strings.<\/p>\n<p>When the return value is 0, it means that str1 is equal to str2;<br \/>\nWhen the return value is less than 0, it means that str1 is less than str2;<br \/>\nWhen the return value is greater than 0, it means that str1 is greater than str2.<\/p>\n<p>Here is an example code that compares string sizes using the strcmp function.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;iostream&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;cstring&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span> <\/span>{\r\n    <span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">char<\/span>* str1 = <span class=\"hljs-string\">\"abc\"<\/span>;\r\n    <span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">char<\/span>* str2 = <span class=\"hljs-string\">\"def\"<\/span>;\r\n\r\n    <span class=\"hljs-type\">int<\/span> result = <span class=\"hljs-built_in\">strcmp<\/span>(str1, str2);\r\n\r\n    <span class=\"hljs-keyword\">if<\/span> (result == <span class=\"hljs-number\">0<\/span>) {\r\n        std::cout &lt;&lt; <span class=\"hljs-string\">\"str1\u548cstr2\u76f8\u7b49\"<\/span> &lt;&lt; std::endl;\r\n    } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span> (result &lt; <span class=\"hljs-number\">0<\/span>) {\r\n        std::cout &lt;&lt; <span class=\"hljs-string\">\"str1\u5c0f\u4e8estr2\"<\/span> &lt;&lt; std::endl;\r\n    } <span class=\"hljs-keyword\">else<\/span> {\r\n        std::cout &lt;&lt; <span class=\"hljs-string\">\"str1\u5927\u4e8estr2\"<\/span> &lt;&lt; std::endl;\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>In the above example, we compared the sizes of two strings &#8220;abc&#8221; and &#8220;def&#8221; by calling the strcmp function. Since &#8220;abc&#8221; is smaller than &#8220;def&#8221;, the final output is &#8220;str1 is less than str2&#8221;.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In C++, you can use the strcmp function to compare the size of two strings. This function is a standard library function in C and is used to compare whether two strings are equal or their size relationship. The prototype of the strcmp function is as follows: int strcmp(const char* str1, const char* str2); The [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[274,381,8516,4731,1115],"class_list":["post-13882","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c","tag-c-programming","tag-strcmp","tag-string-comparison","tag-string-functions"],"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>C++ strcmp: Compare String Size Guide - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to use strcmp function in C++ to effectively compare string size. Complete tutorial with examples.\" \/>\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\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++ strcmp: Compare String Size Guide\" \/>\n<meta property=\"og:description\" content=\"Learn how to use strcmp function in C++ to effectively compare string size. Complete tutorial with examples.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-15T08:03:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-06T00:42:51+00:00\" \/>\n<meta name=\"author\" content=\"Ava Mitchell\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Ava Mitchell\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/\"},\"author\":{\"name\":\"Ava Mitchell\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/a3e2658c2cb9fb2be95ae0a8861f4a64\"},\"headline\":\"C++ strcmp: Compare String Size Guide\",\"datePublished\":\"2024-03-15T08:03:33+00:00\",\"dateModified\":\"2025-08-06T00:42:51+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/\"},\"wordCount\":173,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"keywords\":[\"c#\",\"C++ Programming\",\"strcmp\",\"string comparison\",\"string functions\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/\",\"name\":\"C++ strcmp: Compare String Size Guide - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-15T08:03:33+00:00\",\"dateModified\":\"2025-08-06T00:42:51+00:00\",\"description\":\"Learn how to use strcmp function in C++ to effectively compare string size. Complete tutorial with examples.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.silicloud.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"C++ strcmp: Compare String Size Guide\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"name\":\"Silicon Cloud Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\",\"name\":\"Silicon Cloud Blog\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"contentUrl\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"width\":1024,\"height\":1024,\"caption\":\"Silicon Cloud Blog\"},\"image\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\",\"https:\/\/twitter.com\/SiliCloudGlobal\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/a3e2658c2cb9fb2be95ae0a8861f4a64\",\"name\":\"Ava Mitchell\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/15c63cd0564b4a2e07d611bcdffa296f6ea80e8db07c3091f43a84010514899d?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/15c63cd0564b4a2e07d611bcdffa296f6ea80e8db07c3091f43a84010514899d?s=96&d=mm&r=g\",\"caption\":\"Ava Mitchell\"},\"url\":\"https:\/\/www.silicloud.com\/blog\/author\/avamitchell\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"C++ strcmp: Compare String Size Guide - Blog - Silicon Cloud","description":"Learn how to use strcmp function in C++ to effectively compare string size. Complete tutorial with examples.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/","og_locale":"en_US","og_type":"article","og_title":"C++ strcmp: Compare String Size Guide","og_description":"Learn how to use strcmp function in C++ to effectively compare string size. Complete tutorial with examples.","og_url":"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/","og_site_name":"Blog - Silicon Cloud","article_publisher":"https:\/\/www.facebook.com\/SiliCloudGlobal\/","article_published_time":"2024-03-15T08:03:33+00:00","article_modified_time":"2025-08-06T00:42:51+00:00","author":"Ava Mitchell","twitter_card":"summary_large_image","twitter_creator":"@SiliCloudGlobal","twitter_site":"@SiliCloudGlobal","twitter_misc":{"Written by":"Ava Mitchell","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/#article","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/"},"author":{"name":"Ava Mitchell","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/a3e2658c2cb9fb2be95ae0a8861f4a64"},"headline":"C++ strcmp: Compare String Size Guide","datePublished":"2024-03-15T08:03:33+00:00","dateModified":"2025-08-06T00:42:51+00:00","mainEntityOfPage":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/"},"wordCount":173,"publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"keywords":["c#","C++ Programming","strcmp","string comparison","string functions"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/","url":"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/","name":"C++ strcmp: Compare String Size Guide - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/#website"},"datePublished":"2024-03-15T08:03:33+00:00","dateModified":"2025-08-06T00:42:51+00:00","description":"Learn how to use strcmp function in C++ to effectively compare string size. Complete tutorial with examples.","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/blog\/how-to-compare-the-size-of-strings-using-strcmp-in-c\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.silicloud.com\/blog\/"},{"@type":"ListItem","position":2,"name":"C++ strcmp: Compare String Size Guide"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/blog\/#website","url":"https:\/\/www.silicloud.com\/blog\/","name":"Silicon Cloud Blog","description":"","publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.silicloud.com\/blog\/#organization","name":"Silicon Cloud Blog","url":"https:\/\/www.silicloud.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","contentUrl":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","width":1024,"height":1024,"caption":"Silicon Cloud Blog"},"image":{"@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/SiliCloudGlobal\/","https:\/\/twitter.com\/SiliCloudGlobal"]},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/a3e2658c2cb9fb2be95ae0a8861f4a64","name":"Ava Mitchell","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/15c63cd0564b4a2e07d611bcdffa296f6ea80e8db07c3091f43a84010514899d?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/15c63cd0564b4a2e07d611bcdffa296f6ea80e8db07c3091f43a84010514899d?s=96&d=mm&r=g","caption":"Ava Mitchell"},"url":"https:\/\/www.silicloud.com\/blog\/author\/avamitchell\/"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/13882","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/comments?post=13882"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/13882\/revisions"}],"predecessor-version":[{"id":157891,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/13882\/revisions\/157891"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/media?parent=13882"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/categories?post=13882"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/tags?post=13882"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}