Overloading the Post Increementing operator through friend function

Overloading the Post Increementing operator through friend function:

If d1,d2 are objects of class ‘Distance’  then the following statement

d2= d1++;

is interpretated by the compiler as

d2= operator ++ (Distance, 0);

Example :

class Distance

{

private:

int feet;

float inches;

public:

friend Distance operator ++ (Distance, int); // prototype for overloading the post increment operator

/*

    rest of the class

*/

};

Distance operator ++ (Distance d1, int)

{

return distance (d1.feet++, d1.inches++);

}

void main( )

{

Distance d1,d2;

d2= d1++;

}

Over loading increement and decreement operators: 

friend function

operator overloading