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  1. #1
    Hawks is offline Member
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    Default Java Cupcake Counter Help

    Hello everyone,

    I am in need of help in creating loop for the following scenario. I am new to java and have I am currently stuck on this one.


    1 - one individual cupcake sold (for $2)
    3 - a "package of 3" sold (for $5)
    1 - one individual cupcake sold (for $2)
    6 - a "package of 6" sold (for $8)

    Build a program that will accept the input of each sale. Use a loop that will keep
    accepting input until a sentinel value of 0 (zero) is entered. Ignore any input that is not 1 or 3 or 6; use
    an if or select to accomplish this. While in the loop, you will accumulate the following three values:

    * Total amount of dollar sales. For the input (what package size was sold), use an if or select to
    determine the appropriate dollar sales to add. The prices are above; for example, if "3" is
    entered, add $5 to the Total amount of dollar sales.
    * Total number of cupcakes sold. Add the appropriate number; for example, if "6" is entered, add
    6 to the Total number of cupcakes sold.
    * Number of multi-cupcake packages sold. If the input package size sold is larger than 1, add one
    to this counter. (This will accumulate "we sold 2 multi-cupcake packages", not count how many
    cupcakes were in those packages.) Use an if or select to accomplish this.


    Here is what I currently have

    Java Code:
    public static void main(String[] args) {
     
            //Initialize Variables
            int totalDollarSales = 0;
            int numberCupcakesSold = 0;
            int countMultiCupcakePackages = 0;
            int oneCupcake = 3;
            int threeCupcake = 5;
            int sixCupcake = 8; 
     
            //Create a Scanner for Input
            Scanner input = new Scanner(System.in);  
     
            //Loop cup cake counter
     
     
            //Read an initial input
            System.out.println("Enter package size sold: 1, 3, or 6: ");
            int data = input.nextInt();
     
     
            //Keep reading data until the input is 0
            int sum = 0;
            while (data !=0) {
                sum += data;
     
                //Read the next input
                System.out.println("Enter package size sold - 1, 3, or 6: ");
                data = input.nextInt();
            }

  2. #2
    SurfMan's Avatar
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    Default Re: Java Cupcake Counter Help

    We see the assignment and your code, kudos for that. The only thing that is missing is your question. Does it compile? Does it run? Does it give the output expected? If not, please post the output or stacktrace and we can help. Now we're just in the dark about your problem.

  3. #3
    Hawks is offline Member
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    Default Re: Java Cupcake Counter Help

    I am trying to figure out, What is the total Dollar Sales, Number of cupcakes sold, and Multi Packages sold. I would like those numbers given to me in the output when I answer the question ''Enter package size sold: 1, 3, or 6:"

    Thanks

  4. #4
    SurfMan's Avatar
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    Default Re: Java Cupcake Counter Help

    In your loop from line 24 to 30, you should do something with variable data. So, for example in plain English, aka pseudocode:
    Java Code:
    if data is 3 then add 3 to numberCupcakesSold, add 5 to totalDollarSales and add 1 to countMultiCupcakePackages.
    All you need to do now is translate this into Java.

  5. #5
    Hawks is offline Member
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    Default Re: Java Cupcake Counter Help

    That is my problem SurfMan, I am very new to Java. I get stuck on the part where I have to translate to Java.

  6. #6
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    Default Re: Java Cupcake Counter Help

    Here's a helpful link: The if-then and if-then-else Statements (The Java™ Tutorials > Learning the Java Language > Language Basics). After reading this you will understand. The answer is already there. To help just a little bit more, without spoonfeeding you the answer, I'll add linebreaks. Remember, this still pseudocode, but it should give you a peek of what the if should look like:
    Java Code:
    if data is 3 {
       add 3 to numberCupcakesSold
       add 5 to totalDollarSales
       add 1 to countMultiCupcakePackages.
    }

  7. #7
    Hawks is offline Member
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    Default Re: Java Cupcake Counter Help

    Didnt really come out what i hoped for..

    Java Code:
        public static void main(String[] args) {
    
            //Initialize Variables
            int totalDollarSales = 0;
            int numberCupcakesSold = 0;
            int countMultiCupcakePackages = 0;
            int oneCupcake = 3; 
            int threeCupcake = 5;
            int sixCupcake = 8; 
            
            //Create a Scanner for Input
            Scanner input = new Scanner(System.in);  
            
            //Loop cup cake counter
            if(numberCupcakesSold == 1) {
                totalDollarSales = 3;
                countMultiCupcakePackages = 0;        
            }
            else if(numberCupcakesSold == 3) {
                totalDollarSales = 5;
                countMultiCupcakePackages = 1;
            }
            else if(numberCupcakesSold == 6) {
                totalDollarSales = 8;
                countMultiCupcakePackages = 1;
                        }           
             
            //Read an initial input
            System.out.println("Enter package size sold: 1, 3, or 6: ");
            int data = input.nextInt();
           
            
            //Keep reading data until the input is 0
            int sum = 0;
            while (data !=0) {
                sum += data;
                
                //Read the next input
                System.out.println("Enter package size sold - 1, 3, or 6: ");
                data = input.nextInt();
            }
            
            System.out.println("Total Dollar Sales is " + totalDollarSales);
            System.out.println("Total Cupcakes Sold is " + sum);
            System.out.println("Multi Cupcake Packages is " +
                    countMultiCupcakePackages);
        
        }
    }


    I still get 0 in both Sales and Package output

  8. #8
    SurfMan's Avatar
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    Default Re: Java Cupcake Counter Help

    You're very close. First of all, the if and else ifs should be inside the loop, because the user input has to be checked every time. Second, you should check variable data not numberCupcakesSold, since data is what the user's input was. Variable numberCupcakesSold hold the grand total. So here's what it should look like:
    Java Code:
            System.out.println("Enter package size sold: 1, 3, or 6: ");
            int data = input.nextInt();
             
            //Keep reading data until the input is 0
            while (data !=0) {
               if ( data == 1 ) {
                  totalDollarSales = ?;
                  numberCupcakesSold = ?;
                  countMultiCupcakePackages = ?;
               }
               else if ( data == 3 ) {
                  totalDollarSales = ?;
                  numberCupcakesSold = ?;
                  countMultiCupcakePackages = ?;
               }
               etc...
    
                //Read the next input
                System.out.println("Enter package size sold - 1, 3, or 6: ");
                data = input.nextInt();
            }
    Now, all that remains is what to do with variable totalDollarSales and the other two. Remember that the value you want to assign to totalDollarSales is the *old* value of totalDollarSales *plus* what you just earned. So setting totalDollarSales = 3 would not work since it then *always* will be 3. Add the old value as well to sum it up.

  9. #9
    Hawks is offline Member
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    Default Re: Java Cupcake Counter Help

    Thank you so much for that first part. For the second part, do you mean

    Java Code:
    totalDollarSales=totalDollarSales + data
    Or something like that?

  10. #10
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    Default Re: Java Cupcake Counter Help

    Quote Originally Posted by Hawks View Post
    Thank you so much for that first part. For the second part, do you mean

    Java Code:
    totalDollarSales=totalDollarSales + data
    Or something like that?
    You are so close to nailing this! But you are adding the wrong value to the sales.

    Think about it... What do you add to the total dollar sales variable? The price of whatever the customer bought! So if they bought one cupcake, the price is 3 dollars, so you should add 3. You actually already have three variables that contain these values:
    int oneCupcake = 3;
    int threeCupcake = 5;
    int sixCupcake = 8;

    Same goes for variable numberCupcakesSold: how much do you add when they buy 3 cupcakes? Variable countMultiCupcakePackages: when they buy a single cupcake, do I add 1? When they buy 6, do I add one?

  11. #11
    Hawks is offline Member
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    Default Re: Java Cupcake Counter Help

    Would I have to create another loop for this part? Or where would this data go?

  12. #12
    SurfMan's Avatar
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    Default Re: Java Cupcake Counter Help

    You don't need another loop. This check is done when the user has given input. So this goes inside the existing loop, because you want to recalculate the totals every time th user choses some cupcake amount. And think about the numbers you add to each variable. Let me clarify this with some pseudocode:
    Java Code:
    get user input
    while the user choses a number 
       if the user chose 1 then
          add 1 to number cupcakes sold
          add 3 to total dollars sales
          add nothing to countMultiCupcakePackages (since this is only one cupcake)
       else if the user chose 3 then
          add 3 to number cupcakes sold
          add 5 to total dollars sales
          add 1 to countMultiCupcakePackages 
       else if the user chose 6 then
          add 6 to number cupcakes sold
          add 8 to total dollars sales
          add 1 to countMultiCupcakePackages 
       end if
       get user input
    end while
    You see what I did there?

  13. #13
    Hawks is offline Member
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    Default Re: Java Cupcake Counter Help

    I am not sure what you mean. I have this currently.

    Java Code:
    //Keep reading data until the input is 0
              while (data !=0){
                  if ( data == 1 ) {
                    totalDollarSales = 3; 
                    numberCupcakesSold = 1;
                    countMultiCupcakePackages = 0;
                  }
                  else if ( data == 3 ) {
                    totalDollarSales = 5;
                    numberCupcakesSold = 3;
                    countMultiCupcakePackages = 1;
                  }
                 else if ( data == 6 ) {
                    totalDollarSales = 8;
                    numberCupcakesSold = 6;
                    countMultiCupcakePackages = 1;
                 }
                //Get user input
                  while()
                  
                  
                  
                //Read the next input
                  
                System.out.println("Enter package size sold - 1, 3, or 6: ");
                data = input.nextInt();

    Do I add the commands under the "//Get user input'' ?

  14. #14
    Hawks is offline Member
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    Default Re: Java Cupcake Counter Help

    Thank you for the help, I finally figured it out!

  15. #15
    SurfMan's Avatar
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    Default Re: Java Cupcake Counter Help

    Quote Originally Posted by Hawks View Post
    Thank you for the help, I finally figured it out!
    No problem, I hope it was useful.

  16. #16
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    Default Re: Java Cupcake Counter Help

    Without showing your code or the errors we are blind. Show us what you got so far, including any error messages, and you will get help.

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