Overloading the Pre decrementing operator by using member function

Overloading the Pre decrementing operator by using member function:

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

d2= --sd1;

is interpretated by the compiler as

d2= d1.operator -- ();

Example :

class Distance

{

private:

int feet;

float inches;

public:

Distance operator -- ();  // prototype for overloading the pre decrement operator

/*

    rest of the class

*/

};

Distance Distance :: operator -- ( )

{

return distance (--feet, --inches);

}

void main( )

{

Distance d1,d2;

d2= --d1;

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

}

Over loading increement and decreement operators:

friend function

operator overloading