derived function is called
to demonstrate this is the foll program


#include<iostream.h>
#include<conio.h>

class base
{
public: virtual void vfun()
{
cout<<"this is base virtual function calling";
}
};

class derived1:public base
{
public:void vfun()
{
cout<<"this is derived function calling";
}
};

void main()
{
clrscr();

base *p b;//base class pointer is created

derived1 ob1;

p &ob1;//initialise base class pointer with derived class

p->vfun();//derived function is called

getch();
}
/* output
this is derived function calling*/