Write a C++ program to demonstrate Friend Function.

Write a C++ program to demonstrate Friend Function.  

Code :-

/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Program Name - Program for Friend Function
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
#include<iostream.h>
#include<conio.h>
class value
{
    int a, b;
    public:
    void assign()
    {
        a=25;
        b=40;
    }
    friend int add(value v);
};
int add(value v)
{
    return (v.a + v.b);
}
void main()
{
    clrscr();
    value v1;
    v1.assign();
    cout <<"Addition is :- "<<add(v1);
    getch();
}

/***************************************************
  OUT PUT
Addition is :-  65
*****************************************************/

Output :-

Addition is :- 65