程序代码：

    
    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;
    }