Write a short program that shows how to defeat the slicing problem.

What will be an ideal response?

```
// to defeat the slicing
problem#include public:
B():bPtr(new char('B')){ }
virtual void f(){ cout << "B::f() " << *bPtr <<
endl; }
virtual ~B(){ delete[] bPtr; }
private:
char * bPtr;
};
class D:public B
{
public:
D():B(),dPtr(new char('D')){ }
void f(){ cout << "D::f() " << *dPtr << endl; }
~D() { delete dPtr; }
private:
char * dPtr;
};
int main()
{
B *b1;
B *b = new B;
D *d = new D;
d->f(); // calls D::f()
```