Chapter 12, Problem 3PP

Program Plan Intro

Quiz

Program plan:

Filename: “Question.java”

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

• Define a class “Question”.
  • Define the class members.
  • Define a abstract method “read()”.
  • Define a method “check()”.
    • Return the value.
  • Define a method “getText()”.
    • Return the “text”.
  • Define a method “getAnswer()”.
    • Return the “answer”
  • Define a method “setText()”.
    • Set the value of “text”.
  • Define a method “setAnswer()”.
    • Set the value of “answer”.

Filename: “NumberQuestion.java”

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

• Import the required packages.
• Define a class “NumberQuestion” as extending from “Question”.
  • Define the class member “EPSILON”.
  • Define the method “read()”.
    • Get the value of “text”.
    • Get the value of “answer”.
    • Call the method “setText()” to set the value of “text”.
    • Call the method “setAnswer()” to set the value of “answer”.
  • Define the method “check()”.
    • Define a “try” block.
      • Set the answer to “a”.
      • Set the response to “r”.
      • Check whether “Math.abs(a-r)” is less than “EPSILON” and return the Boolean result.
        • Define the “catch” block to catch the exception.
        • • Return Boolean value “false”.

Filename: “TextQuestion.java”

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

• Import the required packages.
• Define a class “TextQuestion” as extending from “Question”.
  • Define the method “read()”.
    • Get the value of “text”.
    • Get the value of “answer”.
    • Call the method “setText()” to set the value of “text”.
    • Call the method “setAnswer()” to set the value of “answer”.

Filename: “QuestionTester.java”

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

• Import the required packages.
• Define a class “QuestionTester”.
  • Define the method “main()”.
    • Define the “try”.
      • Iterate a “while” loop,
        • If the “type” is equal to “T”,
        • • Define the object of “Question”.
          • Using the object read the file for input.
          • Call the method “getText()” and print the value.
          • Print the expected question.
          • Call the method “getAnswer()” and print the value.
          • Print the expected answer.
          • Call the method “check()”.
          • Print the expected value.
        • Else if the “type” is equal to “N”.
        • • Define the object of “Question”.
          • Using the object read the file for input.
          • Call the method “getText()” and print the value.
          • Print the expected question.
          • Call the method “getAnswer()” and print the value.
          • Print the expected answer.
          • Call the method “check()”.
          • Print the expected value.
        • Else,
        • • Print the statement.
    • Define “catch” block.
      • Print the message to user.