Chapter 8, Problem 15PE

Program Plan Intro

Program plan:

CashRegister.java

• Create a class named “CashRegsiter”.
  • Declare two variables named “purchase” and “payment”.
  • Create a constructor named “CashRegsiter” and initialize “purchase” and “payment” variable value as “0”.
  • Define a function named “recordPurchase” to record the sale of an item.
    • Compute the “newTotal” and store the value into the variable named “newTotal”.
    • Next, store the “newTotal” value into the variable named “purchase”.
  • Define a function named “enterPayment” to calculate the payment received from the customer.
    • Compute the “payment” using two parameters “coinCount” and “coinType” and store the value into the variable named “payment”
  • Define a double function named “giveChange”.
    • Compute the change due and resets the “purchase” and “payment” value of the next customer.
    • Return the “Change” value.

Coin.java

• Create a class named “Coin”.
  • Declare a double variable named “value”.
  • Declare a string variable named “name”.
  • Create an argument constructor named “Coin”.
    • Store the monetary value of the coin into the variable named “value”.
    • Next, store the name of the coin into the variable named “name”.
  • Define a double function named “getValue” and retrieve the coin value.
    • Return the “value” of the coin.
  • Define a string function named “getName” and retrieve the coin name.
    • Return the “name” of the coin.

CashRegisterTester.java

• Create a class named “CashRegisterTester”.
  • Define a main function.
    • Declare three constant variables using the “final” keyword.
    • Create an object named “myRegister” of class “CashRegister”.
    • Call the function “recordPurchase” and pass the amount of an item “0.82”.
    • Call the function “enterPayment” and pass the values of the number of coins and types of coins.
    • Call the function “giveChange” and store the change due value into a variable named “myChange”.
    • Using  the “Print” statement, display the customer change.