Function Calling in c++

 Function Calling in c++

#include <iostream>

using namespace std;

    //declaring a function

void sum() 

{

   int x,y;

    cout << "enter the two number x and y";

  cin>>x>>y;

cout<<"sum is "<<x+y;

}

int main ()

{

     // calling the function

    sum();

    return 0;

}

Output