📄 adjacent_find.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>adjacent_find</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++ Algorithms</a> &gt; <a href=    "adjacent_find.html">adjacent_find</a>  </div>  <div class="name-format">    adjacent_find  </div>  <div class="syntax-name-format">    Syntax:  </div>  <pre class="syntax-box">  #include &lt;algorithm&gt;  iterator adjacent_find( iterator start, iterator end );  iterator adjacent_find( iterator start, iterator end, BinPred pr );</pre>  <p>The adjacent_find() function searches between <em>start</em> and  <em>end</em> for two consecutive identical elements. If the binary  predicate <em>pr</em> is specified, then it is used to test whether  two elements are the same or not.</p>  <p>The return value is an iterator that points to the first of the  two elements that are found. If no matching elements are found, the  returned iterator points to <em>end</em>.</p>  <p>For example, the following code creates a vector containing the  integers between 0 and 10 with 7 appearing twice in a row.  adjacent_find() is then used to find the location of the pair of  7&#39;s:</p>  <pre class="example-code"> vector&lt;int&gt; v1; for( int i = 0; i &lt; 10; i++ ) {   v1.push_back(i);   // add a duplicate 7 into v1   if( i == 7 ) {     v1.push_back(i);              } }               vector&lt;int&gt;::iterator result; result = adjacent_find( v1.begin(), v1.end() );                 if( result == v1.end() ) {   cout &lt;&lt; &quot;Did not find adjacent elements in v1&quot; &lt;&lt; endl; }               else {   cout &lt;&lt; &quot;Found matching adjacent elements starting at &quot; &lt;&lt; *result &lt;&lt; endl; }              </pre>  <div class="related-name-format">    Related topics:  </div>  <div class="related-content">    <a href="find.html">find</a><br>    <a href="find_end.html">find_end</a><br>    <a href="find_first_of.html">find_first_of</a><br>    <a href="find_if.html">find_if</a><br>    <a href="unique.html">unique</a><br>    <a href="unique_copy.html">unique_copy</a>  </div>  </div>  </td>    </tr>  </table></body></html>
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