PROGRAM USING VIRTUAL FUNCTION IN CPP

#include<conio.h>

#include<iostream.h>

class base

{

public:

void display()

{

cout<<"\n Display base";

}

virtual void show()

{

cout<<"\n show base";

}

};

class Derived: public base

{

public:

void display()

{

"\nDisplay derived";

}

void show()

{

"\n show derived";

}

};

void main()

{

base b;

Derived d;

base *bptr;

clrscr();

cout<<" \nbptr points to base \n";

bptr=&b;

bptr->display();

bptr->show();

cout<<"\n\nbptr points to derived \n";

bptr=&d;

bptr->display();

bptr->show();

getch();

}

OUTPUT:

BPTR POINTS TO BASE

DISPLAY BASE

SHOW BASE

BPTR POINTS TO DERIVED

DISPLAY BASE