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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>insert</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++ Double-ended Queues</a> > <a href= "insert.html">insert</a> </div> <div class="name-format"> insert </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> #include <deque> iterator insert( iterator loc, const <a href="../containers.html">TYPE</a>& val ); void insert( iterator loc, <strong>size_type</strong> num, const <a href="../containers.html">TYPE</a>& val ); template<<a href="../containers.html">TYPE</a>> void insert( iterator loc, <a href="../iterators.html">input_iterator</a> start, <a href="../iterators.html">input_iterator</a> end );</pre> <p>The insert() function either:</p> <ul> <li>inserts <em>val</em> before <em>loc</em>, returning an iterator to the element inserted,</li> <li>inserts <em>num</em> copies of <em>val</em> before <em>loc</em>, or</li> <li>inserts the elements from <em>start</em> to <em>end</em> before <em>loc</em>.</li> </ul> <p>For example:</p> <pre class="example-code"> // Create a vector, load it with the first 10 characters of the alphabet vector<char> alphaVector; for( int i=0; i < 10; i++ ) { alphaVector.push_back( i + 65 ); } // Insert four C's into the vector vector<char>::iterator theIterator = alphaVector.begin(); alphaVector.insert( theIterator, 4, 'C' ); // Display the vector for( theIterator = alphaVector.begin(); theIterator != alphaVector.end(); theIterator++ ) { cout << *theIterator; } </pre> <p>This code would display:</p> <pre class="example-code"> CCCCABCDEFGHIJ </pre> <div class="related-name-format"> Related topics: </div> <div class="related-content"> <a href="assign.html">assign</a><br> <a href="erase.html">erase</a><br> (C++ Lists) <a href="../cpplist/merge.html">merge</a><br> <a href="push_back.html">push_back</a><br> <a href="push_front.html">push_front</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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