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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>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> > <a href= "index.html">C++ Maps</a> > <a href="find.html">find</a> </div> <div class="name-format"> find </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> #include <map> iterator find( const <a href="../containers.html">key_type</a>& key );</pre> <p>The find() function returns an iterator to <em>key</em>, or an iterator to the end of the map if <em>key</em> is not found.</p> <p>find() runs in <a href="../complexity.html">logarithmic time</a>.</p> <p>For example, the following code uses the find() function to determine how many times a user entered a certain word:</p> <pre class="example-code"> map<string,int> stringCounts; string str; while( cin >> str ) stringCounts[str]++; map<string,int>::iterator iter = stringCounts.find("spoon"); if( iter != stringCounts.end() ) { cout << "You typed '" << iter->first << "' " << iter->second << " time(s)" << endl; }</pre> <p>When run with this input:</p> <pre class="example-code">my spoon is too big. my spoon is TOO big! my SPOON is TOO big! I am a BANANA!</pre> <p>...the above code produces this output:</p> <pre class="example-code">You typed 'spoon' 2 time(s)</pre> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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