CSU 1826 Languages map和stringstream

/*主要是學會map和stringstream以及getline的使用*/
#include <iostream>
#include <string>
#include <map>
#include<cctype>
#include<algorithm>
#include<sstream>
using namespace std;
int main()
{
#ifdef _debug
	freopen("data.in", "r", stdin);
#endif
	int n;
	cin >> n;
	string str;
	map<string, string>mp;
	getchar();//注意這個地方wa了很久，可能因爲cin後還剩換行；而getline讀取到定界符時會同時抽出定界符，所以後面不需要getchar();
	while (n--) {
		string a, b;
		getline(cin, str);
		stringstream ss(str);//stringstream的初始化（類對象構造）
		ss >> a;
		while (ss >> b) {
			for (int i = 0; i < b.size(); i++)
				if (b[i] >= 'A'&&b[i] <= 'Z')
					b[i] = tolower(b[i]);
			mp[b] = a;
		}
	}
	while (getline(cin, str)) {
		for (int i = 0; i < str.size(); i++) {
			if (str[i] == ',' || str[i] == '.' || str[i] == '!' || str[i] == ';' || str[i] == '?' || str[i] == '(' || str[i] == ')')
				str[i] = ' ';
			else if (str[i] >= 'A'&&str[i] <= 'Z') {
				str[i] = tolower(str[i]);
			}
		}
		stringstream ss(str);
		string b;
		while (ss >> b) {
			if (mp.count(b)) {
				cout << mp[b] << endl;
				break;
			}
		}
	}
	return 0;
}