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Thread: What's wrong with my 3 digit lottery?

  1. #1
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    Smile What's wrong with my 3 digit lottery?

    Greetings. I'm new here and I apologize in advance if I'm asking in the wrong area. Please move me if I'm wrong.

    I am in an intro to java programming class and we have a bonus homework question. I missed the first homework because I couldn't access the homework. Each HW is worth 10 points and this bonus question is worth 3. The question is to generate a 3 digit lottery, use scanner to ask for a 3 digit guess, then the user wins $10,000 if all the numbers match in the correct order, they win $3,000 if all numbers match in any order, and they win $1,000 if any one number matches.

    I can't tell if the 3 in any order are right because I haven't guessed 3 correct numbers. I know the any one matching number is wrong, however... because it says, "Sorry, you win nothing" whenever I guess one or more right. (Edited...I was entering the numbers with spaces between them, as if they were individual scanner inputs. When I just enter a 3 digit interger, it works. Please tell me if my logic looks right for the 3 in any order) I've been staring at this code since Friday and any help you can provide would be appreciated more than you know. We haven't covered this yet in class....that's why it's a bonus question. Here's what I have:

    import java.util.Scanner;  //Scanner is in the java.util package
    public class ThreeDigitLotteryHW {
    	public static void main(String[] args){
     
    	//create 3 digit random forced interger
    	int lottery = (int)(Math.random() * 1000); 
     
    	Scanner input = new Scanner(System.in);
     
    	//Prompt the user to enter 3 intergers
    	System.out.println("Please enter your lottery pick(3 Digits): ");
     
    	int guess = input.nextInt();
     
    	//Turn guess interger into 3 individual intergers
    	int guessDigit1 = guess / 100;
    	int guessDigit2 = (guess / 10) % 10;
    	int guessDigit3 = guess % 10;
     
    	//Turn random 3 digit interger into 3 individual intergers
    	int lotteryDigit1 = lottery / 100;
    	int lotteryDigit2 = (lottery / 10) % 10;
    	int lotteryDigit3 = lottery % 10;
     
    	//Print converted random intergers
    	System.out.println("The lottery number is: " + lotteryDigit1 + " " + lotteryDigit2 + " " +lotteryDigit3);
     
    	//If user guesses all numbers in the correct order, they win $10,000
    	if (guess == lottery)
    		System.out.println("You win $10,000.");
     
    	//If 1st digit is correct and last two are correct in any order, user wins $3,000
    	else if 
    		((guessDigit1 == lotteryDigit1) &&
    		(guessDigit2 == lotteryDigit2 ||
    		guessDigit2 == lotteryDigit3) &&
    		guessDigit3 == lotteryDigit2 ||
    		guessDigit3 == lotteryDigit3)
    		System.out.println("You win $3,000.");
     
    	//If 2nd digit is correct and 1st and 3rd are correct in any order, user wins $3,000
    	else if 
    		((guessDigit2 == lotteryDigit2) &&
    		(guessDigit3 == lotteryDigit3 ||
    		guessDigit3 == lotteryDigit1) &&
    		guessDigit1 == lotteryDigit1 ||
    		guessDigit1 == lotteryDigit3)
    		System.out.println("You win $3,000.");
     
    	//If 3rd digit is correct and 1st and 2nd are correct in any order, user wins $3,000
    	else if 
    		((guessDigit3 == lotteryDigit3) &&
    		(guessDigit1 == lotteryDigit1 ||
    		guessDigit1 == lotteryDigit2) &&
    		guessDigit2 == lotteryDigit2 ||
    		guessDigit2 == lotteryDigit1)
    		System.out.println("You win $3,000.");
     
    	//If 1st guess is correct in any lottery result, user wins $1,000
    	else if
    		(guessDigit1 == lotteryDigit1 ||
    		guessDigit1 == lotteryDigit2||
    		guessDigit1 == lotteryDigit3)
    		System.out.println("You win $1,000");
     
    	//If 2nd guess is correct in any lottery result, user wins $1,000
    	else if
    		(guessDigit2 == lotteryDigit1 ||
    		guessDigit2 == lotteryDigit2 ||
    		guessDigit2 == lotteryDigit3) 
    		System.out.println("You win $1,000");
     
    	//If 3rd guess is correct in any lottery reult, user wins $1,000
    	else if
    		(guessDigit3 == lotteryDigit1 ||
    		guessDigit3 == lotteryDigit2 ||
    		guessDigit3 == lotteryDigit3)
    		System.out.println("You win $1,000.");
     
    	/*As we have used all other results, if no lottery results
    	 * are guessed correctly, print, "Sorry, you win nothing"
    	 */
    	else
    		System.out.println("Sorry, You win nothing.");
     
    	//Close the input
    	input.close();
    Last edited by =Artie3881=; March 2nd, 2014 at 02:05 PM. Reason: forgot to highlight/ used exclusive or instead of or


  2. #2
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    Default Re: What's wrong with my 3 digit lottery?

    Welcome to the forum! Please read this topic to learn how to post code in code or highlight tags and other useful info for new members.

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    Default Re: What's wrong with my 3 digit lottery?

    Sorry...thanks Greg

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    Default Re: What's wrong with my 3 digit lottery?

    I can't tell if the 3 in any order are right because I haven't guessed 3 correct numbers.
    In the future, rather than depending on luck, build test cases of known "random" lottery numbers. For example, rather than generate a real random lottery number, set the variable 'lottery' to a constant, like 123. Then see what happens when the user enters "guesses" that match all 3 in order, all 3 in any order, etc. From there, correct your logic to work correctly.

    I take it you don't know arrays yet.

    Since your update where you said "it works," I'm not sure what you're asking for help with. Please clarify.

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    Default Re: What's wrong with my 3 digit lottery?

    Thanks for the reply Greg. No, I don't know arrays yet. I tried to just enter an interger for lottery instead of using random but got an error.\

    I got it to work for guess one number in any spot. I think the logic is there for it to work with three numbers in any order, but IDK how to test it. That's what I'm wondering....will it work if I guess three numbers in any order.

    I'm not asking for anyone to test it and try it for me, but could you please look at my first "if else" statements and tell me if it looks like it should work? I just want to be sure I get full credit for this assignment and as sad is it may be, I put two days' worth of work into this code so I just want someone's blessing before submitting it.

    Thanks for taking the time to write to me and I hope someone can take the time to review my logic.

    Thanks again, enjoy the rest of your evening.

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    Default Re: What's wrong with my 3 digit lottery?

    tell me if it looks like it should work
    With complicated if statements, it is easy to miss something.
    Better to thoroughly test it.
    If you don't understand my answer, don't ignore it, ask a question.

  7. The Following User Says Thank You to Norm For This Useful Post:

    =Artie3881= (March 3rd, 2014)

  8. #7
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    Default Re: What's wrong with my 3 digit lottery?

    Quote Originally Posted by GregBrannon View Post
    In the future, rather than depending on luck, build test cases of known "random" lottery numbers. For example, rather than generate a real random lottery number, set the variable 'lottery' to a constant, like 123. Then see what happens when the user enters "guesses" that match all 3 in order, all 3 in any order, etc. From there, correct your logic to work correctly.

    I take it you don't know arrays yet.

    Since your update where you said "it works," I'm not sure what you're asking for help with. Please clarify.
    Thanks Greg and Norm. I thought it was testing it would be much more complicated.

    I just set the lottery number to 123 then tested all 3 cases and it worked!!! I had been forgetting to use a semicolon after entering a three digit interger for lottery. I'm thrilled that I got this b**** to work because I made a lot of mistakes along the way.

    Thanks for taking the time to correct my mistaks when I first posted, Greg. I really think this forum will be a great resource for me. I plan to utilize it, this time knowing the proper way to post. I think I like programming, I get a real feeling of satisfaction when I get a program to run properly. This is the first program that stumped me for more than a couple of minutes.

    Thanks again & enjoy your snow day if you're in the Northeast.

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    Default Re: What's wrong with my 3 digit lottery?

    Good job, and congrats for figuring it out.

    Yep, I'm home, waiting for the big snow to hit, staying off the roads.

    Be well.

  10. The Following User Says Thank You to GregBrannon For This Useful Post:

    =Artie3881= (March 3rd, 2014)

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