Polymorphism and Virtual Function in C++ : Basics

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

class Parent
{
public:
void virtual print()
{
cout<<"I am Parent"<<endl;
}

};

class Child : public Parent
{
public:
void print()
{
cout<<"I am child"<<endl;
}
};

void main()
{
clrscr();
Parent b;
Child d;
Parent *p;
p=&d;
p->print();
p=&b;
p->print();

getch();
}