c++ primer 5.4.1节练习答案

 1 int main()
 2 {
 3     vector<string> str;
 4     string str1,str2;
 5     int max = 0;
 6     while (cin >> str1)
 7     {
 8         int cnt = 0;
 9         str.push_back(str1);
10         auto it = str.begin();
11         while (it != str.end())
12         {
13             if (*it == str1)
14                 ++cnt;
15             ++it;
16         }
17         if (cnt > max)
18         {
19             max = cnt;
20             str2 = str1;
21         }
22     }
23     cout << str2 << " appear " << max << "times" << endl;
24     system("pause");
25     return 0;
26 }