Lecture 12

Problem Statement

Write a program for the Bank of EE160. The teller will type in the account type and account balance. The program will let the teller know if a minimum balance fee needs to be charged. The Bank of EE160 has saving accounts and checking accounts. For saving accounts, the minimum balance is \$1,000. For checking accounts, the minimum balance is \$500. The program will allow the teller to continue entering in account balances and types until the teller is done entering all of the accounts.

The program will also print out a summary of all the accounts with the total number of accounts and the total amount in all accounts

What is the problem asking for?

A program that takes in the account type and account balance. The program returns whether or not a minimum balance fee should be charged to the account

The program prints a summary of all the accounts detailing the total number of accounts and total amount in all accounts

input:
- account balance (decimal number)
- account type (character)
- exit program (character)
output:
- message telling the teller if the minimum balance fee should be charged or not ("A minimum balance fee needs to be charged to this account." or "A minimum balance fee does not need to be charged to this account."
- accounts summary with the following information:
  - total number of accounts
  - total amount in all accounts

Algorithm Design

How can a computer solve this in a step-by-step manner?

it needs to check if the account is a saving account
it needs to check if the account is a checking account
it needs to check if the account balance is less than $1,000 for saving account
it needs to check if the account balance is less than $500 for checking account
it needs to check if the teller wants to exit the program

it needs to display a message to tell the teller to charge a minimum balance
it needs to display a message to tell the teller to not charge a minimum balance
it needs to continue reading in account balances and account types until the user wants to exit the program
it needs to count the number of accounts
it needs to total the amount of all the accounts

How can we arrange the questions and tasks to develop an algoirthm (step-by-step procedure) that will meet our requirements?:

How can we simplify the problem?
What order should the questions be asked?
What order should the program tasks be done?

What is the algorithm?

while there are more accounts to be checked
  check if the account is a saving account
    when yes, then
      check if the account balance is less than \$1000
        when yes, then
          tell the teller to charge the minimum balance fee
        otherwise,
          tell the teller to not charge the minimum balance fee
    otherwise, (assume) the account is a checking account
      check if the account balance is less than \$500
        when yes, then
          tell the teller to charge the minimum balance fee
        otherwise
          tell the teller to not charge the minimum balance fee
  update accounts summary information
  ask the user if there are more accounts to be checked
display accounts summary information

Write the program

translate your algorithm into code, accounts_summary.c:

Modify the program

update the program to report the number of accounts with balances above the minimum balance (e.g. the number of accounts in good standing)

Assignment

Homework Problem 12.1, at the end of this problem you should submit to Laulima:

a file named UHusername_12_1.c
- zhaol_12_1.c
improve accounts_summary.c to show total amount of minimum balance fees to be collected (assume the fee is $20):

the variable total_amount_in_accounts does not need to be modified for this exercise

Test Case 1:

Please enter the account balance:
[user enters 100]
c = checking, s = saving
Please enter the account type:
[user enters c]
A minimum balance fee needs to be charged to this account.

Are you finished checking all your accounts?:
Enter 'n' to check more accounts; Enter any other character to exit
[user enters n]
Please enter the account balance:
[user enters 150]
c = checking, s = saving
Please enter the account type:
[user enters s]
A minimum balance fee needs to be charged to this account.

Are you finished checking all your accounts?:
Enter 'n' to check more accounts; Enter any other character to exit
[user enters y]
==== Accounts Summary ====
The total number of accounts: 2
The total amount in all accounts: \$250.00
The total amount of minimum balance fee collected: \$40.00