hdu 2072 单词数

set的应用
 1 #include<iostream>
 2 #include<cstdio>
 3 #include<string>
 4 #include<set>
 5 using namespace std;
 6 int main()
 7 {
 8     freopen("input.txt","r",stdin);
 9     string s,s1;
10 
11     bool flag;
12     while(getline(cin,s) && s != "#")
13     {
14         set<string>goal;
15         flag = 0;
16         s += " ";
17         for(int i = 0; i < s.size(); i++)
18         {
19             if(s[i] != ' ')
20             {
21                 s1 += s[i];
22                 flag = 1;
23             }
24             else if(flag)
25             {
26                 goal.insert(s1);
27                 s1.clear();
28                 flag = 0;
29             }
30         }
31         cout<<goal.size()<<endl;
32     }
33 }