void test01() {
//构造方法
pair<int, int> p1(, );
cout << p1.first << p1.second << endl; pair<int, string> p2 = make_pair(, "assd");
cout << p2.first << p2.second << endl; pair<int, string> p3 = p2;
}
void test01() {
//构造方法
pair<int, int> p1(, );
cout << p1.first << p1.second << endl; pair<int, string> p2 = make_pair(, "assd");
cout << p2.first << p2.second << endl; pair<int, string> p3 = p2;
}