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Thread: How to create this recursive method.

  1. #1
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    Default How to create this recursive method.

    I need to write a function which, taking a positive integer n as input,
    and finds all sets of numbers that sum up to n.
    For example, n=4, the printing result will be:
    4
    3,1
    2,2
    2,1,1
    1,1,1,1

    --- Update ---

    Please help


  2. #2
    Administrator Norm's Avatar
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    Default Re: How to create this recursive method.


  3. #3
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    Default Re: How to create this recursive method.

    Quote Originally Posted by Norm View Post
    My method so far.
    Still working on it.

    public class JavaApplication1 {


    public static void main(String[] args) {

    sum(1,0,4);
    }

    public static void sum(int now,int remainder, int sum ){

    System.out.println(remainder);

    if (now == sum)
    return;

    if (remainder == sum)
    {
    remainder = 0;
    sum(now++,remainder,sum);
    return;
    }
    else{
    sum(now,remainder++,sum);
    return;
    }
    }
    }

  4. #4
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    Default Re: How to create this recursive method.

    My method so far.

    package javaapplication1;

    /**
    *
    * @author Gordon
    */
    public class JavaApplication1 {

    /**
    * @param args the command line arguments
    */
    public static void main(String[] args) {
    // TODO code application logic here
    sum(1,0,4);
    }

    public static void sum(int now,int remainder, int sum ){

    System.out.println(remainder);

    if (now == sum)
    return;

    if (remainder == sum)
    {
    remainder = 0;
    sum(now++,remainder,sum);
    return;
    }
    else{
    sum(now,remainder++,sum);
    return;
    }
    }
    }

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