CS 203
Project 6
Due Date: Before Monday August, the 28th.


	Write a program, using tree, that provides a way for you to store and retrieve telephone

	numbers.

	Design a user interface that provides the following operations:

	   Add: Adds a person's name and phone number to the phone book.

	   Delete: Deletes a given person's name and phone number from the phone book, given

	only the name.

	   Find: Locates a person's phone number, given only the person's name.

	   Change: Changes a person's phone number, given the person's name and new phone number.

	   Quit: Quits the application, after first saving the phone book in a text file.

	You can proceed as follow:
	
	   - Design and implement the class "Person", which represents the name and phone number

	of a person. You will store instances of this class in the phone book.

	   - Design and implement the class "PhoneBook", which represents the phone book. The class

	should contain a binary	search tree as a data field. This tree contains the people in the book.

	   - Add methods that use a text file to save and restore the tree.
	
	   - Design and implement the class "Menu", which provides the program's user interface.