Write a program for overloading operator ++ and operator -- using friend functions.

Write a program for overloading operator ++ and operator -- using friend functions.

Program Code:

#include<iostream>

using namespace std;

class book

{

private:

int x,y;

public:

book(int a,int b)

{

x=a;

y=b;

}

void showdata()

{

cout<<" \n value of x :"<<x<<endl;

cout<<"\n value of y:"<<y<<endl;

}

friend book operator ++(book &abc);

friend book operator --(book &abc);

};

book operator ++(book &abc)

{

abc.x++;

abc.y++;

return abc;

}

book operator –(book &abc)

{

abc.x--;

abc.y--;

return abc;

}

void main()

{

book b1(5,25);

clrscr();

b1.showdata();

++b1;

b1.showdata();

--b1;

b1.showdata();

}

Output:

the value of x:5

the value of y:25

the value of x:6

the value of y:26

the value of x:5

the value of y:25

Thanks

Mukesh Rajput