Chapter 9, Problem 4PE

Program Plan Intro

Quiz Question

Program plan:

Filename: “Question.java”

This program file is used to define a class “Question”. In the code,

• Define a class “Question”.
  • Declare class variables “text” and “answer”.
  • Define a constructor “Question()”.
    • Initialize the “text” and “answer”.
  • Define a method “setAnswer()”.
    • Initialize the value of “answer”.
  • Define a method “checkAnswer()”.
    • Return the value.
  • Define a method “display()”.
    • Print the value of “text”.

Filename: “AnyCorrectChoiceQuestion.java”

This program file is used to define a class “AnyCorrectChoiceQuestion” as extending from “Question”. In the code,

• Define a class “AnyCorrectChoiceQuestion”.
  • Declare the class members, array list “choices” and “choiceString”.
  • Define a constructor “FillInQuestion()”.
    • Invoke the constructor.
    • Initialize the array list.
  • Define a method “addChoice()”.
    • Call the method “add()” to add the choices.
    • If the condition is true,
      • If the value of “choiceString” is equal to null,
      • Set the value of “choiceString”.
        • If the condition is not true,
        • • Set the value of “choiceString”.
  • Define a method “checkAnswer()”.
    • Return the value.
  • Define a method “display()”.
    • Call the method “display()” of super class.
    • Prompt the user to enter the correct choice.
    • Iterate a “for” loop.
      • Declare the variable “choiceNumber” and set its value.
      • Print the value.

Filename: “QuestionDemo.java”

This program file is used to define a class “QuestionDemo” to test the class “AnyCorrectChoiceQuestion”. In the code,

• Define a class “QuestionDemo”.
  • Define a method “main()”.
  • Declare an array of objects.
  • Create the object “question0” of “AnyCorrectChoiceQuestion”.
  • Call the method “addChoice()” multiple times using “question0”.
  • Set a value of “question0” to “quiz[0]”.
  • Create the object “question1” of “AnyCorrectChoiceQuestion”.
  • Call the method “addChoice()” multiple times using “question1”.
  • Set a value of “question1” to “quiz[1]”.
  • Create an object of “Scanner” class.
  • Iterate a “for” loop.
    • Call the method “display”.
    • Prompt the user to enter the answer.
    • Scan for the value.
    • Call the method “checkAnswer()” and print the result.