Chapter 5, Problem 3P

Program Plan Intro

Magic 8 ball game using class

Program Plan:

“MagicBall.java”:

• • Define “MagicBall” class.
  • ○ Define method “displayAnswer()” which is used to returns an answer at random number.
    • ■ Generate a random number by using “(int)(Math.random() * 8) + 1” and then store that value in the variable “num”.
    • ■ Performs “Switch” case for “num”.
      • • If the generated number is “1”, then print “It is certain”. Break the statement after this case.
      • • If the generated number is “2”, then print “It is decidedly so”. Break the statement after this case.
      • • If the generated number is “3”, then print “Most likely”. Break the statement after this case.
      • • If the generated number is “4”, then print “Signs point to yes”. Break the statement after this case.
      • • If the generated number is “5”, then print “Reply hazy, try again”. Break the statement after this case.
      • • If the generated number is “6”, then print “Ask again later”. Break the statement after this case.
      • • If the generated number is “7”, then print “Don’t count on it”. Break the statement after this case.
      • • If the generated number is “8”, then print “My sources say no”. Break the statement after this case.

“MagicBallTest.java”:

• • Import required package.
• • Define “MagicBallTest” class.
  • ○ Define main function.
    • ■ Create an object for scanner class.
    • ■ Create an object “b” from “MagicBall” class.
    • ■ Declare a variable “str” in "String" type.
    • ■ Performs “do-while” loop.
      • • Call method “displayAnswer” for object “b”.
      • • Prompt statement for ask whether the user wants to continue or not.
      • • Read user choice.
      • • If the string “str” is “n”, then the loop will exits.