資工趴趴熊的小天地

題目:

https://vjudge.net/problem/UVA-10815

C++:

#include <iostream>
#include <sstream>
#include <set>
using namespace std;
 
int main() {
    string s, t;
    set <string> st;
    while (cin >> s) {
        for (int i = 0; i < s.size(); i++) {
            if (isalpha(s[i])) s[i] = tolower(s[i]);
            else s[i] = ' ';
        }
        stringstream ss(s);
        while (ss >> s) {
            st.insert(s);
        }
    }
    set <string>::iterator it;
    for (it = st.begin();it!=st.end();it++) {
        cout << *it << "\n";
    }
    return 0;
}