Using classes, design an online address book to keep track of the names, addresses, phone numbers, and dates of birth of family members, close friends, and certain business associates. Define a class addressType that can store a street address, city, state, and ZIP code. Use the appropriate functions to print and store the address. Also, use constructors to automatically initialize the member variables. Define a class extPersonType using the class personType with following members and methods: firstname, lastname, and accessors and mutators, print to display, and constructors.

Problem (Online Address Book):

Using classes, design an online address book to keep track of the names, addresses, phone numbers, and dates of birth of family members, close friends, and certain business associates.

1. Define a class addressType that can store a street address, city, state, and ZIP code. Use the appropriate functions to print and store the address. Also, use constructors to automatically initialize the member variables.
2. Define a class extPersonType using the class personType with following members and methods: firstname, lastname, and accessors and mutators, print to display, and constructors.

 Define a class dateType for month, day and year as members with its accessors, mutators, and constructors)

Design a 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.

1. Define the class addressBookType using the previously defined classes. An object of the type addressBookType should be able to process any number of entries.

The program should perform the following operations:

1. Load the data into the address book from data file.
2. Sort the address book by last name.
3. Search for a person by last name.
4. Print the address, phone number, and date of birth (if it exists) of a given person.
5. Print the names of the people whose birthdays are in a given month.
6. Print the names of all the people between the two last names.
7. Depending on the user’s request, print the names of all family members, friends, or business associates.
8. Allow the user to save the data in the address book.

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