C++ Program Illustrates The Overloading Of Unary Minus (-) Operator

#include <iostream.h>


#include <conio.h>


class Minus


{


    private:


                      int a, b, c;


    public:


                      Minus( ) {} // Default Constructor


                      Minus(int A, int S, int C)


              {


                     a = A;


                     b = S;


                     c = C;


               }


                     void display(void);


 //********Declaration of the operator function**********


                     void operator - ( );


 }; // End of the Class Definition


 //***********Member Function Definitions*************


            inline void Minus:: display(void)


       {


           cout<<"\t a="<< a <<endl;


          cout<<"\t b=" << b <<endl;


          cout<<"\t c = "<< c<< endl;


        }


   //*********Definition of the operator function***********


          inline void Minus :: operator - ()


        {


                a = -a;


                b = -b;


                c = -c;


           //*************Main Function Definition**************


        }


           void main(void)


      {


            clrscr();


            Minus M(5, 10, -15);


            cout <<"\nBefore Activating the Operator - ( )\n";


            M.display( );


            -M;


            cout<< "\nAfter Activating the Operator - ( )\n";


            M.display( );


            getch();


       }