UVa10815 Andy's First Dictionary （STL）

 1 #include <iostream>
 2 #include <string>
 3 #include <cctype>
 4 #include <set>
 5 #include <sstream>
 6 using namespace std;
 7 
 8 set<string> dict;
 9 
10 int main() {
11     string s, buf;
12     while (cin >> s) {
13         for (int i = 0; i < s.length(); i++)
14             if (isalpha(s[i])) s[i] = tolower(s[i]); else s[i] = ‘ ‘;
15         stringstream ss(s);
16         while (ss >> buf) dict.insert(buf);
17     }
18     for (set<string>:: iterator it = dict.begin(); it != dict.end(); it++)
19         cout << *it << endl;
20     return 0;
21 }