Friend Function

Example 1:

// Friend Function

#include <iostream>
using namespace std;
class frnd
{
private:
   int a,b;
public:
   void input()
    {
     cout<<"Enter the value of a and b\n";
     cin>>a>>b;
    }

  friend int compute(frnd f1);
};

int compute(frnd f1)
{
  int x=f1.a+f1.b;
  return x;
}

int main()
{
  frnd f;
  f.input();
  cout <<"The result is: "<< compute(f)<<"\n";
return 0;
}