Design and implement a C++ program that defines a
base class A, which has a subclass B, which itself has a
subclass C. The A class must implement a method, which
is overridden in both B and C. You must also write a test
class that instantiates A, B, and C and includes three calls
to the method. One of the calls must be statically bound
to A’s method. One call must be dynamically bound to
B’s method, and one must be dynamically bound to C’s
method. All the method calls must be through a
pointer to class A.
