empty.html
来自「从www.CppReference.com打包的C++参考手册」· HTML 代码 · 共 68 行
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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>empty</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++ Queues</a> > <a href="empty.html">empty</a> </div> <div class="name-format"> empty </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> #include <queue> bool empty() const;</pre> <p>The empty() function returns true if the queue has no elements, false otherwise.</p> <p>For example, the following code uses empty() as the stopping condition on a <a href= "../keywords/while.html">while</a> loop to clear a queue while displaying its contents:</p> <pre class="example-code"> queue<int> q; for( int i = 0; i < 5; i++ ) { q.push(i); } while( !q.empty() ) { cout << q.front() << endl; q.pop(); } </pre> <div class="related-name-format"> Related topics: </div> <div class="related-content"> <a href="size.html">size</a> </div> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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