📄 erase.html
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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>erase</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++ Maps</a> > <a href="erase.html">erase</a> </div> <div class="name-format"> erase </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> #include <map> void erase( iterator pos ); void erase( iterator start, iterator end ); <strong>size_type</strong> erase( const <a href="../containers.html">key_type</a>& key );</pre> <p>The erase function() either erases the element at <em>pos</em>, erases the elements between <em>start</em> and <em>end</em>, or erases all elements that have the value of <em>key</em>.</p> <p>For example, the following code uses erase() in a <a href= "../keywords/while.html">while</a> loop to incrementally clear a map and display its contents in order:</p> <pre class="example-code"> struct strCmp { bool operator()( const char* s1, const char* s2 ) const { return strcmp( s1, s2 ) < 0; } }; ... map<const char*, int, strCmp> ages; ages["Homer"] = 38; ages["Marge"] = 37; ages["Lisa"] = 8; ages["Maggie"] = 1; ages["Bart"] = 11; while( !ages.empty() ) { cout << "Erasing: " << (*ages.begin()).first << ", " << (*ages.begin()).second << endl; ages.erase( ages.begin() ); }</pre> <p>When run, the above code displays:</p> <pre class="example-code"> Erasing: Bart, 11 Erasing: Homer, 38 Erasing: Lisa, 8 Erasing: Maggie, 1 Erasing: Marge, 37</pre> <div class="related-name-format"> Related topics: </div> <div class="related-content"> <a href="begin.html">begin</a><br> <a href="clear.html">clear</a><br> <a href="empty.html">empty</a><br> <a href="size.html">size</a> </div> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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