Program Of Virtual Function In C++

 #include< iostream.h>

#include< conio.h>

class abc

{

public:

void display()

{

cout<< "\nInside base class.";

}

};

class xyz:public abc

{

public:

void display()

{

cout<< "\nInside 1st derived class.";

}

};

class mn:public abc

{

public:

void display()

{

cout<< "\nInside 2nd derived class.";

}

};

void main()

{

clrscr();

xyz ob;

mn ob1;

abc *ptr;

ptr=&ob;

cout<< "\nFor object of 1st derived class."<< endl;

ptr->display();

ptr=&ob1;

cout<< "\nFor object of 2nd derived class."<< endl;

ptr->display();

getch();

}