//write a program to unary operator overload with class function
#include<iostream.h>
#include<conio.h>
class demo
{
    int a,b;
    public:
    demo()
    {
        a=10;
        b=-20;
    }
    void operator -()
    {
        a=-a;
        b=-b;
    }
    void display()
    {
        cout<<"\nA ="<<a<<endl;
        cout<<"\nB ="<<b<<endl;
    }
};
void main()
{
    clrscr();
    demo d; // d is a object if you know this allredy then excelent.
    d.display();
    -d; // operator overload finding - sign operator in above void main.
    cout<<"\nOperator Overload Sucessfully... check below\n";
    d.display();
    getch();
}