erase.html
来自「从www.CppReference.com打包的C++参考手册」· HTML 代码 · 共 95 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>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++ Strings</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 <string> iterator erase( iterator loc ); iterator erase( iterator start, iterator end ); string& erase( <strong>size_type</strong> index = 0, <strong>size_type</strong> num = npos );</pre> <p>The erase() function either:</p> <ul> <li>removes the character pointed to by <em>loc</em>, returning an iterator to the next character,</li> <li>removes the characters between <em>start</em> and <em>end</em> (including the one at <em>start</em> but not the one at <em>end</em>), returning an iterator to the character after the last character removed,</li> <li>or removes <em>num</em> characters from the current string, starting at <em>index</em>, and returns *this.</li> </ul> <p>The parameters <em>index</em> and <em>num</em> have default values, which means that erase() can be called with just <em>index</em> to erase all characters after <em>index</em> or with no arguments to erase all characters.</p> <p>For example:</p> <pre class="example-code"> string s("So, you like donuts, eh? Well, have all the donuts in the world!"); cout << "The original string is '" << s << "'" << endl; s.erase( 50, 14 ); cout << "Now the string is '" << s << "'" << endl; s.erase( 24 ); cout << "Now the string is '" << s << "'" << endl; s.erase(); cout << "Now the string is '" << s << "'" << endl; </pre> <p>will display</p> <pre class="example-code"> The original string is 'So, you like donuts, eh? Well, have all the donuts in the world!' Now the string is 'So, you like donuts, eh? Well, have all the donuts' Now the string is 'So, you like donuts, eh?' Now the string is '' </pre> <p>erase() runs in <a href="../complexity.html">linear time</a>.</p> <div class="related-name-format"> Related topics: </div> <div class="related-content"> <a href="insert.html">insert</a> </div> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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