"真" map函数

请问map是给入门做的吗？？？
------------------防窥线------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
下面是不正经代码

#include<iostream>
using namespace std;
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    short x;
    cin>>x;
    cout<<'['<<x;
    cin>>x;
    cout<<", "<<x<<", ";
    cin>>x;
    cout<<x<<']';
    return 0;
}