Overloading the Pre Increementing operator through a friend function

Overloading the Pre Increementing operator through a 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);

Example :

class Distance

{

private:

int feet;

float inches;

public:

friend Distance operator ++ (Distance);  // prototype for overloading the pre increment operator

/*

    rest of the class

*/

};

Distance operator ++ (Distance d1 )

{

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

}

void main( )

{

Distance d1,d2;

d2= ++d1;

cout<<d2.feet<< endl <<de.inches;

}

Over loading increement and decreement operators:

operator overloading

friend function