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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>eof</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">C++ I/O</a> > <a href="eof.html">eof</a> </div> <div class="name-format"> eof </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> #include <fstream> bool eof();</pre> <p>The function eof() returns true if the end of the associated input file has been reached, false otherwise.</p> <p>For example, the following code reads data from an input stream <em>in</em> and writes it to an output stream <em>out</em>, using eof() at the end to check if an error occurred:</p> <pre class="example-code"> char buf[BUFSIZE]; do { in.read( buf, BUFSIZE ); std::streamsize n = in.gcount(); out.write( buf, n ); } while( in.good() ); if( in.bad() || !in.eof() ) { // fatal error occurred } in.close(); </pre> <div class="related-name-format"> Related topics: </div> <div class="related-content"> <a href="bad.html">bad</a><br> <a href="clear.html">clear</a><br> <a href="fail.html">fail</a><br> <a href="good.html">good</a><br> <a href="rdstate.html">rdstate</a> </div> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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