题解 | #查找学生信息#

#include<iostream>
#include<string>
#include<map>
using namespace std;


//方法一
int main1()
{
	int N, M;
	map<string, string> maps;
	while (cin >> N) {
        cin.ignore();
		string s;
		for (int i = 0; i < N; i++) {
			getline(cin, s);
			maps[s.substr(0, s.find(" "))] = s;
		}
		cin >> M;
		for (int j = 0; j < M; j++) {
			cin >> s;
			if (maps.find(s) == maps.end()) {
				cout << "No Answer!" << endl;
			}
			else {
				cout << maps[s] << endl;
			}
		}
	}

	return 0;
}


//方法二

//例题10.7 查找学生信息
struct Student {
	string num;
	string name;
	string gender;
	int age;
};

int main()
{
	map<string, Student> maps;
	int N, M;
	while (cin >> N) {
		Student s;
		for (int i = 0; i < N; i++) {
			cin >> s.num >> s.name >> s.gender >> s.age;
			maps[s.num] = s;
		}
		cin >> M;
		string ss;
		for (int i = 0; i < M; i++) {
			cin >> ss;
			if (maps.find(ss) == maps.end()) {
	cout << "No Answer!" << endl;
}
else {
	cout << maps[ss].num << " " << maps[ss].name << " " << maps[ss].gender << " " << maps[ss].age << endl;
}
		}
	}

	return 0;
}