/* Now I give myself the ability to promote an employee */

void employee::promote(string newp)
{ cout << fname << " " << lname << " promoted from "
       << position << " to " << newp << "\n";
  position = newp; }


/* Person number 8 in the vector was created with "new employee", the object
   is an employee, but the compiler rejects this                             */

  A[8]->promote("senior person");

/* because the vector was declared as a vector of pointers to persons, and
   person objects do not have promote methods.

   The type cast tells the compiler "just pretend this is a pointer to an
   employee, and do what you would do if it really were, so this works       */

  ((employee *)A[8])->promote("senior person");

/* but it is very dangerous. I could easily type                             */

  ((employee *)A[14])->promote("senior person");

/* and nobody would know the difference.
   If we're lucky it will crash the program */