Upcasting
	• Notice that when we have a pointer to an account object and we initialize or assign it to the address of a student or checking object, that we are still actually pointing to the student or checking object. • This is the only time in C++ when it is allowed to assign a pointer of one type to another without an explicit cast operation. • This is because a pointer      to a derived class object      points to a direct or      indirect base class object      as well!