Well, you will first need to define n1 and n2 as an int variable sinice they will be integers:
int n1, n2;
Then you will use the cin function to get user input:
std::cin>>n1;
std::cin>>n2;
Then you will want to print it, so you use the cout function:
std:: cout<<"First number is: "<<n1<<"\nSecond number is: "<<n2;
Keep us posted on your progress.