OPERATOR OVERLOADING USING UNARY MEMBER FUNCTION

//program for operator overloading of unary op using mem fn
#include<iostream.h>
#include<conio.h>
class c
{
  int x,y,z;
  public:
      void display()
      {
cout<<x<<" "<<y<<" "<<z<<endl;
      }
      void getdata(int a,int b,int c)
      {
x=a;
y=b;
z=c;
      }
      void operator -();
};
void c::operator -()
{
  x=-x;
  y=-y;
  z=-z;
}
void main()
{
  c s;
  clrscr();
  s.getdata(-10,90,100);
  s.display();
  -s;
  s.display();
  getch();
}