Write a C++ program to demonstrate virtual function.

Write a C++ program to demonstrate virtual function..  

Code :-

/************************************************

TITLE:Programe for VIRTUAL FUNCTION

**************************************************/

# include<iostream.h>

# include<conio.h>

class base

{

                public:

                void disp()

                {

                                cout<<"\nBase Class Display() call";

                }

                virtual void show()

                {

                                cout<<"\nBase Class Show() call";

                }

};

class derived:public base

{

                public:

                void disp()

                {

                                cout<<"\nDerived class Display() Call";

                }

                void show()

                {

                                cout<<"\nDerived Class Show() Call";

                }

};

void main()

{

                clrscr();

                base b1;

                derived d1;

                cout<<"\nBase Pointer BPTR Points to base class\n";

                base *bptr;

                bptr=&b1;

                bptr->disp();

                bptr->show();



                cout<<"\n\nBase Pinter BPTR Points to Derived class\n";

                bptr=&d1;

                bptr->disp();

                bptr->show();



                getch();

}

Output :-

Base Pointer BPTR Points to base class

Base Class Display() call

Base Class Show() call

Base Pinter BPTR Points to Derived class

Base Class Display() call

Derived Class Show() Call