Derived Class Pointer

#include

#include

class BC

{

public:

int b;

void show()

{

cout<<"\nb="<

}};

class DC:public BC

{

public:

int d;

void show()

{

cout<<"\nb="<

cout<<"\nd="<

}};

void main()

{

clrscr();

BC *bptr;

BC base;

bptr=&base;

bptr->b=100;

bptr->show();

DC derived;

bptr=&derived;

bptr->b=200;

bptr->show();

DC *dptr;

dptr=&derived;

dptr->d=300;

dptr->show();

dptr->d=400;

((DC *)bptr)->d=500;

((DC *)bptr)->show();

cout<<"\n(DC *)bptr->show()";

getch();

}

OUTPUT

b=100

b=200

b=200

d=300

b=200

d=500

(DC *)bptr->show()