Bank Accounts C++ Question

code in c++

Assignment Overview

This assignment focuses on the design, implementation and testing of a program which uses file processing to solve the problem described below.

Assignment Specifications

Consider a small bank which uses a text file to maintain information about its customers. Each customer record in that master file is stored on one line of the file and contains the following information:

? Account number (6 characters)

? Account balance (10 characters)

? Account holder (remaining characters on the line)

There is exactly one space (blank) between the fields.

Account numbers range from 100000 to 999998 (inclusive). The account number 999999 is reserved as a sentinel to mark the end of the customer records (the last line of the file contains 999999).

Account balances range from 0.00 to 9999999.99 (inclusive).

Design, implement and test a program which allows the bank to interactively enter transactions and produces a new (updated) master file.

1. The program will prompt the user to enter a file name prefix. That prefix will be used to generate the names of the two files by appending .old.txt and .new.txt to the prefix. For example, if the prefix is customers, then the names will be customers.old.txt (the old master file) and customers.new.txt (the new master file).

If the old master file cannot be opened for reading or the new master file cannot be opened for writing, the program will display an appropriate error message and halt.

2. For each customer record in the old master file, the program will:

? Display the customer information

? Prompt the user for any transactions related to that customer and process those

transactions

? Write the customer record to the new master file (unless the account has been closed)

The list of valid transactions is given below.

The format of the new master file will be the same as the format of the old master file: each customer record will contain the fields specified above, and the last line of the file will contain 999999. 3. The program will recognize the following transaction codes:

CISC 1600/1610

(d )eposit, (w)ithdrawal, (c)lose, (a)dvance to next customer

For code 'd', the program will prompt the user for the amount of money to be deposited into the customers account. That amount will be added to the account balance, as long as the new total does not exceed the upper bound.

For code 'w', the program will prompt the user for the amount of money to be withdrawn from the customers account. That amount will be subtracted from the account balance, as long as the new total does not exceed the lower bound.

For code 'c', the program will delete that customer record from the master file, as long as the account balance is zero. When an account is closed, the program will advance to the next customer in the old master file.

For code 'a', the program will advance to the next customer in the old master file.

If a transaction is not valid, the program will display an appropriate error message and ignore that transaction.

4. The program will assume that an existing master file is error-free. 5. The program will detect, report and recover from all errors related to user inputs.

6. The program will include a separate function which compares two floating point values for equality:

? equal_floats( x_flt, y_flt): given two floats, compare for equality and return a Boolean By definition, two floats are equal if the absolute value of their difference is less than 1.0e-8.

Assignment Notes

An example master file is given below, where the first digit of the account number is the first character on each line:

 100000 43736.57 MacGregor, Charlotte D. 100789 5681745.99 Williamson, Bryan 320056 5.01 Canady, George Lucas 650430 2398.12 Fremont, Lorraine Elizabeth 999999 

An example of a series of user inputs related to the example master file is given below:

 100000 43736.57 MacGregor, Charlotte D. (d)eposit, (w)ithdrawal, (c)lose, (a)dvance to next customer 

w

Amount: 1000.00 w Amount: 500.50 d

Amount: 200.00 a

 100789 5681745.99 Williamson, Bryan (d)eposit, (w)ithdrawal, (c)lose, (a)dvance to next customer a 

320056 5.01 Canady, George Lucas (d)eposit, (w)ithdrawal, (c)lose, (a)dvance to next customer w Amount: 5.01 c

 650430 2398.12 Fremont, Lorraine Elizabeth (d)eposit, (w)ithdrawal, (c)lose, (a)dvance to next customer a 

 End of file reached. 

The new master file resulting from that series of transactions is given below:

 100000 42436.07 MacGregor, Charlotte D. 100789 5681745.99 Williamson, Bryan 650430 2398.12 Fremont, Lorraine Elizabeth 999999 

Consider the situation where the user enters a (and only a) for each customer in the old master file. The new master file which results from that series of transactions is identical (character by character) to the old master file.