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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>assign</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> &gt; <a href=    "index.html">C++ Strings</a> &gt; <a href="assign1.html">assign</a>  </div>  <div class="name-format">    assign  </div>  <div class="syntax-name-format">    Syntax:  </div>  <pre class="syntax-box">  #include &lt;string&gt;  void assign( <strong>size_type</strong> num, const char&amp; val );  void assign( <a href="../iterators.html">input_iterator</a> start, <a href="../iterators.html">input_iterator</a> end );  string&amp; assign( const string&amp; str );  string&amp; assign( const char* str );  string&amp; assign( const char* str, <strong>size_type</strong> num );  string&amp; assign( const string&amp; str, <strong>size_type</strong> index, <strong>size_type</strong> len );  string&amp; assign( <strong>size_type</strong> num, const char&amp; ch );</pre>  <p>The deafult assign() function gives the current string the values  from <em>start</em> to <em>end</em>, or gives it <em>num</em> copies  of <em>val</em>.</p>  <p>In addition to the normal (C++ Lists) <a href=  "../cpplist/assign.html">assign</a>() functionality that all C++  containers have, strings possess an assign() function that also  allows them to:</p>  <ul>    <li>assign <em>str</em> to the current string,</li>    <li>assign the first <em>num</em> characters of <em>str</em> to the    current string,</li>    <li>assign a substring of <em>str</em> starting at <em>index</em>    that is <em>len</em> characters long to the current string,</li>  </ul>  <p>For example, the following code:</p>  <pre class="example-code">   string str1, str2 = &quot;War and Peace&quot;;   str1.assign( str2, 4, 3 );   cout &lt;&lt; str1 &lt;&lt; endl;            </pre>  <p>displays</p>  <pre class="example-code">   and          </pre>  <p>This function will destroy the previous contents of the  string.</p>  <div class="related-name-format">    Related topics:  </div>  <div class="related-content">    (C++ Lists) <a href="../cpplist/assign.html">assign</a>  </div>  </div>  </td>    </tr>  </table></body></html>
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