hdu 2072 单词数（C++的stringstream对象）

#include <iostream>#include <sstream>#include <string>#include <map>using namespace std;int main(){    string s;    while (getline(cin, s)){        if (s == "#"){            break;        }        stringstream in(s);        string ss;        map<string, int> mp;        int cnt = 0;        while (in >> ss){            mp[ss]++;            if (mp[ss] == 1){                cnt++;            }        }        cout << cnt << endl;    }    return 0;}