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Thread: previous value of same variable

  1. #1
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    Default previous value of same variable

    How can I compare previous value of same variable(result) with current value.
    Example, result 1 > result 2 or not, result 2 > result 3 or not, result 3 > result 4 or not, result 4 > result 5 or not.
    import java.util.Random;
    public class Test {
        public static void main(String args[]){
            double A = 5;
            Test Cal = new Test();
            Cal.run(A);        
        }
        void run(double A){
            Random random = new Random();
            double result;
            int i = 0;
            do{
               i++;
                    result = A + random.nextGaussian() / 2;
                    System.out.println(result);
            }while(i<5);           
        }
    }

    regard
    ray


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    Administrator copeg's Avatar
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    Default Re: previous value of same variable

    This thread has been cross posted here:

    http://www.java-forums.org/new-java/63128-previous-value-same-variable.html

    Although cross posting is allowed, for everyone's benefit, please read:

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  3. #3
    Super Moderator helloworld922's Avatar
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    Default Re: previous value of same variable

    Keep track of the previous result in a temporary variable.

    Example work-flow:

    Init. 2 variables, last val and current val.

    Get current val, set last val equal to current val.
    for i = 1, i < 5, ++i
    get a new current val
    compare it to the last val
    set last val equal to current val

  4. The Following User Says Thank You to helloworld922 For This Useful Post:

    raybrown (September 19th, 2012)

  5. #4
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    Talking Re: previous value of same variable

    Quote Originally Posted by helloworld922 View Post
    Keep track of the previous result in a temporary variable.

    Example work-flow:

    Init. 2 variables, last val and current val.

    Get current val, set last val equal to current val.
    for i = 1, i < 5, ++i
    get a new current val
    compare it to the last val
    set last val equal to current val
    Perfect work-flow.
    I understand and can do it.
    Thank you very much for your help.

    ray

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