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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>freopen</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 I/O</a> > <a href= "freopen.html">freopen</a> </div> <div class="name-format"> freopen </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> #include <stdio.h> FILE *freopen( const char *fname, const char *mode, FILE *stream );</pre> <p>The freopen() function is used to reassign an existing <em>stream</em> to a different file and mode. After a call to this function, the given file <em>stream</em> will refer to <em>fname</em> with access given by <em>mode</em>. The return value of freopen() is the new stream, or <strong>NULL</strong> if there is an error.</p> <div class="related-name-format"> Related topics: </div> <div class="related-content"> <a href="fclose.html">fclose</a><br> <a href="fopen.html">fopen</a> </div> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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