
Java: An Introduction to Problem Solving and Programming (8th Edition)
8th Edition
ISBN: 9780134462035
Author: Walter Savitch
Publisher: PEARSON
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Question
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.
- ○ Define method “displayAnswer()” which is used to returns an answer at random number.
“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.
- ○ Define main function.
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Chapter 5 Solutions
Java: An Introduction to Problem Solving and Programming (8th Edition)
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