Uva10815——Andy's First Dictionary

#include <iostream>
#include <string>
#include <set>
#include <sstream>
using namespace std;

set<string> dict;

int main()
{
//	freopen("10815.txt", "r", stdin);
	string s, buf;
	while(cin >> s)
	{
		for(int i = 0; i < s.length(); i++)
			if(isalpha(s[i]))
				s[i] = tolower(s[i]);
			else
				s[i] = ' ';

			stringstream ss(s);
			while(ss >> buf)
				dict.insert(buf);
	}
	for(set<string>::iterator it = dict.begin(); it != dict.end(); it++)
		cout << *it << endl;
	return 0;
}