Define a class extPersonType using the class personType (as
defined in Example 11-9, Chapter 11), the class dateType (as designed
in this chapter’s Programming Exercise 2), and the class addressType.
Add a member variable to this class to classify the person as a family
member, friend, or business associate. Also, add a member variable to store
the phone number. Add (or override) the functions to print and store the
appropriate information. Use constructors to automatically initialize the
member variables