#include<iostream>
#include<unordered_map>
#include<tuple>
using namespace std;
int main(){
unordered_map<int,tuple<int,int>> A;
tuple<int, int> p1=make_tuple(1,1);
A.insert(make_pair<int,tuple<int,int>>(1,make_tuple(1,2)));
for(auto i:A){
cout<<i.first<<endl;
}
cout<<std::get<0>(p1)<<endl;
return 0;
}
输出:
1
1