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Thread: Buej programming issue

  1. #1
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    Post Buej programming issue

    Hi there i am relativity new to java programming and i am having trouble with creating a code which increases the fish's length by 1% of the amount of food eaten?

    Here is the code:

    public class Fish
      {
        private String name;
        private int age;
        private double length;
        private String species;
        private double temperature;
        private boolean isFemale;
        private double numEggs;
     
     
     
    /**
         * Constructor for objects of class Fish
         */
            public Fish(String newName)
           {
            name = newName;
            age = 1; // takes about 1 week to hatch from an egg
            length = 10; // slightly small
            species = "Clownfish";
            temperature = 27; // ideal body temperature for a fish
            isFemale = true;
            numEggs = 0;
            }
     
         /**
         * The fish grows by 1% of the amount of pellets eaten
         */
            public void eatFood (int pellets)
           {
            length=(length+pellets);
            System.out.println(length + " " + "cm's");
            }
    }

    Thanks
    Last edited by BeardedAxeWound; August 8th, 2012 at 05:31 PM.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Buej programming issue

    Please Edit your post and wrap your code with
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.

    Can you write an algebraic equation for how the value of the length should change?

    Do you know that 1% = .01 or 1/100
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Buej programming issue

    Hey Norm, i am unsure of what to exactly write for that method therefore the method which i have written there is incorrect.

    So i was wondering what exactly I would have to write to achieve the correct method.

  4. #4
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    Default Re: Buej programming issue

    As norm said 1% = 0.01 = 1/100,so you should add to length of the fish the (amount of pellets)*(1/100),if having problem post back

  5. #5
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    Default Re: Buej programming issue

    Thank you very much it finally works
    Last edited by BeardedAxeWound; August 8th, 2012 at 05:52 PM.

  6. #6
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    Default Re: Buej programming issue

    The goal is to increase the length of the fish by (1%)*(pellets) -correct me if i am wrong.
    For instance you have a really big fish,that in a meal ate 200 pellets.Before meal fish's length was 10 m.Now it ate 200 pellets,so it has to grow up.How much?It's previous length plus the length it gained while eating.
    Your code
    length = (pellets) *(1/100);
    is translated into this --> New length of the fish = the length it gained while eating.
    Why is this false?Because you take into no consider the length that the fish had before the meal.So give it another shot

    As for the newbie,no problem

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