Program plan: CashRegister.java: Define a class named “CashRegister” and track the total price as an integer to avoid roundoff errors. Declare an integer variable named “itemCount”. Declare an integer variable named “totalPrice”. Create a constructor named “CashRegister” and assign the value of variables “itemCount” and “totalPrice” as “0” Define a function named “addItem” and calculate the “totalPrice” as an integer and increment the “itemCount” variable. Define a function named “getTotal”. Using “getTotal” retrieve and return the “totalPrice” of the current sale. Define a function named “getCount” Using the “getCount” method, retrieve and return the “itemCount” of the number of items. Define a function named “clear”. Using the “clear()” method, clear the garbage values of “itemCount” and “totalPrice”. CashRegisterTest.java: Define another class named “CashRegisterTest” and the keyword “extends” indicates that a class is inherited from another class named “CashRegister”. Define a main function. Create an object named “register1” of another class “CashRegister”. Call the function “clear()”and remove all the garbage values from the “register1” object. Call the function “addItem()”and add the values to the object “register1”. Call the function “getCount()” and print the number of items in the current sale. Call the function “getTotal()” and display the total of all items.

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Chapter 8, Problem 11PP

Program Plan Intro

Program plan:

CashRegister.java:

Define a class named “CashRegister” and track the total price as an integer to avoid roundoff errors.

Declare an integer variable named “itemCount”.

Declare an integer variable named “totalPrice”.

Create a constructor named “CashRegister” and assign the value of variables “itemCount” and “totalPrice” as “0”

Define a function named “addItem” and calculate the “totalPrice” as an integer and increment the “itemCount” variable.

Define a function named “getTotal”.

Using “getTotal” retrieve and return the “totalPrice” of the current sale.

Define a function named “getCount”

Using the “getCount” method, retrieve and return the “itemCount” of the number of items.

Define a function named “clear”.

Using the “clear()” method, clear the garbage values of “itemCount” and “totalPrice”.

CashRegisterTest.java:

Define another class named “CashRegisterTest” and the keyword “extends” indicates that a class is inherited from another class named “CashRegister”.

Define a main function.

Create an object named “register1” of another class “CashRegister”.

Call the function “clear()”and remove all the garbage values from the “register1” object.

Call the function “addItem()”and add the values to the object “register1”.

Call the function “getCount()” and print the number of items in the current sale.

Call the function “getTotal()” and display the total of all items.

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