swap.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>swap</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++ Vectors</a> > <a href="swap.html">swap</a> </div> <div class="name-format"> swap </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> #include <vector> void swap( container& from );</pre> <p>The swap() function exchanges the elements of the current vector with those of <em>from</em>. This function operates in <a href= "../complexity.html">constant time</a>.</p> <p>For example, the following code uses the swap() function to exchange the contents of two vectors:</p> <pre class="example-code"> vector<string> v1; v1.push_back("I'm in v1!"); vector<string> v2; v2.push_back("And I'm in v2!"); v1.swap(v2); cout << "The first element in v1 is " << v1.front() << endl; cout << "The first element in v2 is " << v2.front() << endl;</pre> <p>The above code displays:</p> <pre class="example-code"> The first element in v1 is And I'm in v2! The first element in v2 is I'm in v1!</pre> <div class="related-name-format"> Related topics: </div> <div class="related-content"> <a href="vector_operators.html">= operator</a><br> (C++ Lists) <a href="../cpplist/splice.html">splice</a> </div> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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