新手， 哪位高手帮小弟我看看这个map如何写

新手求助， 谁帮我看看这个map怎么写

C/C++ code

#include<iostream>#include<map>#include<string>using namespace std;int main(){     map<int,mymap>ac;    map<string,int>mymap;      system("pause");  }

C/C++ code

#include<iostream>#include<map>#include<string>using namespace std;int main(){     map<int,map<string,int> >ac;    map<string,int> mymap;      system("pause");  }