Concept of Friend Function in C++

Friend Function of C++

#include<iostream.h>
#include<conio.h>

class fri
{
   int a,b;
   public:
       void input(int x,int y)
       {
          a=x;
          b=y;
        }
        friend int add(fri t)
        {
           int sum;
           sum=(t.a+t.b);
           cout<<"Sum is:"<<sum;
        }
};

void main()
{
   fri r;
   r.input(2,8);
   add(r);
   getch();
}

output