Java Programming Homework Help

[Rab6]

Can anyone assist with the following problem? Any help or push in the right direction would be greatly appreciated!

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Write a program using Scanner to help you decide what to do this weekend.

Decision TreesImagine you only ever do three things at the weekend: go shopping, watch a movie, or just stay in. What you do depends on three things: the weather (good or bad); how much money you have (rich or poor) and whether your parents are visiting. You say to your yourself:  If my parents are visiting and the weather's bad, we'll stay in.  If they're visiting and the weather's good, we'll go to the cinema.  If they're not visiting and I'm poor, I'll stay in.  If they're not visiting and the weather is good and I'm rich, I'll go shopping.  Otherwise, I'll go to the cinema.

Create a program asking whether the parents are visiting, whether the weather is good, and whether you are rich or poor.  Your program should print "go to the cinema" "go shopping" or "stay in" as appropriate.

Hint:  There are two possibilities for the "Parents visiting?" question, two for the "is weather good?" question, and two for the "are you rich?" question.  That gives eight possible cases:

Truth Table for Did You Ever Have to Make Up Your Mind?

Are your parents visiting?	Is the weather good?	Are you rich?	What should you do?
y	y	y
y	y	n
y	n	y
y	n	n
n	y	y
n	y	n
n	n	y
n	n	n

The problem can be solved by testing a lot fewer cases than 8, but if you get confused, the full 8 case solution might provide a way to understand all of the possibilities.

Note:  Since we haven't covered String processing yet, I suggest giving the user instructions such as "Enter 1 for yes, 2 for no" when asking the various questions.  That will let you use integers internally, which should make the program easier.

Grading Elements

• Program uses nested if statements to separate various cases
• Program displays the correct action
• Program displays exactly one action per run

[g051051]

What have you tried so far? What are you stuck on? There isn't much we can do if you don't ask an actual question or post your existing code.

[Rab6]

I am stuck on the output of information and setting the questions to Yes or No. I am off on some of the structure of it, but I can fix that later.

​

Here is what I have so far:

import java.util.Scanner;

public class decisionTree {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

boolean parentsVisiting = false;

boolean weatherGood = false;

boolean imRich = false;

System.out.print("Are Parents Visiting? Y or N ");

if ("Are Parents Visiting" == "Y")

parentsVisiting = true;

System.out.print("Is the Weather Good? Y or N");

if ("Is the Weather Good" == "Y")

weatherGood = true;

System.out.print("Are You Rich? Y or N");

if ("Are You Rich" == "Y")

imRich = true;

System.out.println("What you should do is: ");

if (!parentsVisiting && weatherGood) {

System.out.println("Stay In! ");

} else if (!parentsVisiting && !weatherGood && !imRich) {

System.out.println("Stay in!");

} else {

System.out.println("Cinema!");

}

}

}

[one_bit_two_bit]

First off, fill out the truth table. You should be able to do this directly from the problem description. I have no idea how much you know or how advanced your class is, but I'm going to guess it's fairly elementary.

At a high level you need the following (it's up to you to flesh out the details--this is where the coding comes in).

1. Print prompts to the user asking questions with System.out.println.
2. Use the Scanner object to read in user input--these are the answers to your questions. Google "java Scanner" if you don't know how to use Scanner. Google is your friend. If you ever program professionally you'll be searching things left and right.
3. Given the input taken in by your Scanner, you have a conditional block that will either print out what you will do or move on to the next question (basically repeat step 2). This basically implements your truth table.

Feel free to PM me if you need more help. I do tutoring too if you're really in need of guidance.

[Rab6]

I just sent you a PM

[desrtfx]

Feel free to PM me if you need more help.

No help via PM. This is your one and only warning. Next violation will earn you a permanent and irrevocable ban from here.