Chapter 4, Problem 21PE

Program Plan Intro

Cash register

Program plan:

Filename: “CashRegisterTester.java”:

• Define the “CashRegisterTester” class
• Define the “main()” method,
  • Declare the different objects for “CashRegister” class.
  • Call the method “recordPurchase()” with an argument.
  • Call the method “enterDollars()” with an argument.
  • Call the method “enterQuarters()” with an argument.
  • Display the output.
  • Display the expected month names.

Filename: “CashRegister.java”:

• Define the class “CashRegister”.
• Declare the required private variables.
• Define the constructor.
  • Set the value.
• Define the “recordPurchase()” method.
  • Calculate the purchase value.
• Define the “enterDollars()” method.
  • Calculate the payment value.
• Define the “enterQuarters()” method.
  • Calculate the payment value.
• Define the “enterDimes()” method.
  • Calculate the payment value
• Define the “enterNickels()” method.
  • Calculate the payment value.
• Define the “enterPennies()” method.
  • Calculate the payment value.
• Define the “giveChange()” method.
  • Calculate the difference of payment and purchase.
  • Assign “0” to “pur” and “pay” variables.
  • Return the difference.