#include<iostream> //NO .h here

int subtract(int n1, int n2); // Function prototype

int main()
{
  int no1, no2;
  cout<<"Enter two numbers:"<<endl;
  cin>>no1>>no2;
  cout<<"The difference is:"<<endl;
  cout<<subtract(no1,no2);  // Function call
}

int subtract(int n1, int n2) // Function definition
{
   return n1 - n2;
}