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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>width</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="width.html">width</a> </div> <div class="name-format"> width </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> #include <fstream> int width(); int width( int w );</pre> <p>The function width() returns the current width, which is defined as the minimum number of characters to display with each output. The optional argument <em>w</em> can be used to set the width.</p> <p>For example:</p> <pre class="example-code"> cout.width( 5 ); cout << "2"; </pre> <p>displays</p> <pre class="example-code"> 2 </pre> <p>(that's four spaces followed by a '2')</p> <div class="related-name-format"> Related topics: </div> <div class="related-content"> <a href="fill.html">fill</a><br> <a href="precision.html">precision</a> </div> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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