Phone book
Version 1.0

SPECIFICATION
  

OVERVIEW

A simple phone book whose entries consist of a name and a 
phone number.  The user can browse the phone book, search for 
an entry, and add, edit and delete entries.  


DETAILS

The phone book displays a single entry, which consists of a 
name and a phone number on separate line.  Below the entry, a 
menu of commands is displayed.  Below that menu, the prompt 
"command:" is displayed.  The user types the first letter of a 
command, the command executes and the appropriate entry is 
displayed.  Some commands prompt the user for more information.  

The entries are displayed in alphabetical order.  No entry is 
displayed if the phone book is empty.  


SAMPLE INTERFACE  

John Smith
123-456-7890
--------------------------------------------------
  next      search  edit    quit  
  previous  add     delete  
-------
command: e
new number: 


COMMANDS

next: The next entry is displayed.  Wraps around.

previous: The previous entry is displayed.  Wraps around.

search: Asks for a name and displays the corresponding entry.  
If not found, the earlier entry is redisplayed.

add: Asks for a new name and phone number, adds a new entry to 
the phone book and displays the new entry.

edit: Asks for a new number and edits the current entry.  Does 
nothing if the phone book is empty.  

delete: Deletes the current entry.  Displays the next one (with 
possible wrap-around).  Does nothing if the phone book is 
empty.  

quit: Saves the phone book to a file and halts the program.



NOTES FOR LATER VERSIONS

Add error-checking.