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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>none</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++ Bitsets</a> > <a href="none.html">none</a> </div> <div class="name-format"> none </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> #include <bitset> bool none();</pre> <p>The none() function only returns true if none of the bits in the bitset are set to 1.</p> <div class="related-name-format"> Related topics: </div> <div class="related-content"> <a href="any.html">any</a> </div> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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