#include <iostream.h>


class parent
{
public:

   int i1;

   void f1()
   {
      cout << "parent method" << endl;
   }
};

class child : public parent
{
public:
   int i2;

   void f2()
   {
      cout << "child method" << endl;
   }
};

int main(int argc, char **argv)
{
   parent x, *p;
   child y, *q;


   y.i1 = 1;
   y.i2 = 1000;

   p = &y;	// Casted child variable y into parent reference p

   q = (child *) p;

   cout << "q->i1 = " << q->i1 << endl;   // OK
   cout << "q->i2 = " << q->i2 << endl;   // OK too !!
}