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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head> <meta name="generator" content= "HTML Tidy for Linux/x86 (vers 1 September 2005), see www.w3.org"> <title>strncmp</title> <link href="../cppreference.css" rel="stylesheet" type="text/css"></head><body><table> <tr> <td> <div class="body-content"> <div class="header-box"> <a href="../index.html">cppreference.com</a> > <a href= "index.html">Standard C String and Character</a> > <a href= "strncmp.html">strncmp</a> </div> <div class="name-format"> strncmp </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> #include <string.h> int strncmp( const char *str1, const char *str2, size_t count );</pre> <p>The strncmp() function compares at most <em>count</em> characters of <em>str1</em> and <em>str2</em>. The return value is as follows:</p> <table class="code-table"> <tr> <th class="code-table-th">Return value</th> <th class="code-table-th">Explanation</th> </tr> <tr> <td class="code-table-td">less than 0</td> <td class="code-table-td">''str1'' is less than ''str2''</td> </tr> <tr> <td class="code-table-td">equal to 0</td> <td class="code-table-td">''str1'' is equal to ''str2''</td> </tr> <tr> <td class="code-table-td">greater than 0</td> <td class="code-table-td">''str1'' is greater than str2''</td> </tr> </table> <p>If there are less than <em>count</em> characters in either string, then the comparison will stop after the first null termination is encountered.</p> <div class="related-name-format"> Related topics: </div> <div class="related-content"> <a href="strchr.html">strchr</a><br> <a href="strcmp.html">strcmp</a><br> <a href="strcpy.html">strcpy</a><br> <a href="strlen.html">strlen</a><br> <a href="strncat.html">strncat</a><br> <a href="strncpy.html">strncpy</a> </div> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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