assignmentFile

Bank Transactions
Introduction
This assignment will give you practice w/user and program interfaces, and choosing/building useful data
structures.
You will maintain a flat-file log, or database, allowing users to query, and add an entry.
The Assignment
Write a command-line utility called accounts that uses what is, essentially, a log file, a list of transactions
(deposits and withdrawals).
The account number will be the primary key; that is, no 2 accounts may have the same account number. 2
different accounts may, however, have the same name. (E.g., you may have a checking account, and a savings
account.)
You will allow the user to view account info, and history, and to add transactions, as follows:
Options, and Descriptions
-i — Account info
1. Display an enumerated, alphabetical list of account holders†, followed by the account number
(Note, these lines should be unique)
2. You will allow the user to choose an account by entering the number, or to quit by entering a q
3. You will then list account info:
1. Account #
2. Account holder's name
3. Balance
4. Prompt to return to the list of account holders (so the user has time to read the output)
-h — History
1. Display the same account menu as above
2. Allow the user to choose an account by entering the number, or to quit by entering a q
3. If an account is selected, list all the transactions for that account, in chronological order (you may
assume the transactions in the input file are in chronological order). You will print, on one line, the
date, the type (deposit or withdrawal), and the amount
-t — Insert transaction
1. Again, get an account choice, as above, with an option to create a new account (be careful that the
account # doesn't already exist)
2. Then prompt for:
1. Type (withdrawal or deposit), using simple keystrokes (w or d, followed by [enter])
2. The amount
3. Use the current day's date
4. Return to the choose-account menu
-? — Show usage msg and quit
†You may assume that all names are entered exactly. That is, do not worry about inconsistencies in spelling or
capitalisation. E.g., John Doe, Jonathon Doe, and john doe are 3 different clients for this assignment. Further,
for purposes of alphabetising, take the name to be that single string. Don't attempt to extract first, last name
information.
If no argument is supplied, print a usage message and exit.