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Thread: Boolean method help!

  1. #1
    Member Scorks's Avatar
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    Default Boolean method help!

    Hello all!

    So, I'm creating a program that deals with a discount loyalty system. When the customer buys $100.00 worth of items, they get a $10.00 discount. This discount needs to be a boolean method (discountReached()). Thus far, I have:

    class Customer {
     
    //Declare variables
    double totalCost;
    double discount = 10;
     
     
    public Customer() {
    totalCost = 0;
    }
     
    public void makePurchase(double amount) {
    totalCost = totalCost + amount;
    }
     
    public double getTotal() {
    return totalCost;
    }
     
     
     
    }

    So, I have the total amount all worked out. Now I don't know how to go about having the boolean method ONLY run once when the total reaches over $100.00.

    Any help is appreciated!

    Thanks,
    Scorks


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Boolean method help!

    having the boolean method ONLY run once when the total reaches over $100.00.
    If you want to call the method the first time the total reaches that amount, use a boolean variable to remember that the method has been called. Initialize it to false.
    Test the variable before calling the method and set it immediately after calling the method. Next time testing the variable will tell you that the method has been called
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
    Member Scorks's Avatar
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    Default Re: Boolean method help!

    Okay, but I'm not sure how to make the boolean method work, either. I guess I would start like:
    public boolean discountReached() {
    totalCost - 10;
    return totalCost;
    }

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    Super Moderator Norm's Avatar
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    Default Re: Boolean method help!

    how to make the boolean method work
    By boolean method I assume you mean a method that returns a boolean value.
    When should the method return true?
    When should the method return false?

    When you answer those questions, you should be able to write an if statement that implements the logic need to return the desired value.
    If you don't understand my answer, don't ignore it, ask a question.

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