Your goal in this program is to write an address book. Your program should present the user with three menu options:
1. Display the current people in the address book.
2. Add a new person to the address book
3. Quit the program
Your address book should use a structure to store the first name, last name, phone number and email address of each person. You don't need to use any file I/O, just use an array of your structure to store each entry. You can assume that the address book has a maximum capacity of 100 people that it can store.