The unary minus operator using friend function

The unary minus operator using friend function

<header files>

class A

{

int x;

A(int=0);

public:

friend A operator –(A);

};

A  operator –(A Aobj)

{

return A(-Aobj .x);

}

void main()

{

int y;

A a1, a2;

cout<<”Enter the value of y”;

cin>>y;

a2.x=x;

a1= -a2;

cout<<a1.x

}

operator overloading

Over loading increement and decreement operators:

Over loading relational operators

friend function