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Thread: Coin Loop Selective Print Statement Problem

  1. #1
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    Unhappy Coin Loop Selective Print Statement Problem

    This is a homework assignment and I am stuck and I have researched every book I know that talks about loops.
    I am required to print the loop at every 25th loop up to 500, i.e. 1-25th, 26-75th, 100th, 125th, etc.

    I guess another way of stating my problem is that I want to sum up the toss results for every 25 loop iterations up to 500. Can someone please explain how I can do this? Right now my code is printing all 500 loops.

     package coin;
     
    import java.util.Random;
     
    public class Coin 
    {
        public static void main(String[] args) 
        {
           int heads =0, tails =0, tossResult, total;
           double tailsPercent, headsPercent;
           Random coinTossing = new Random();
     
           System.out.println("Number of tosses\t\tNo. of Heads\\ % \t\tNo. of Tails\\ %");
     
           for (int i = 1; i <= 50; i++)
           {
               tossResult = coinTossing.nextInt(2);
     
               if (tossResult == 0)
     
               {
                  heads++;
               }
     
               else
     
               {
                  tails++;
               }
     
               total = heads + tails;
               headsPercent = ((double)(heads)/total)*100;
               tailsPercent = ((double)(tails)/total)*100;
     
               System.out.printf("\t%d\t\t\t\t%d  %.1f\t\t%d  %.1f", total, heads,
                       headsPercent, tails, tailsPercent);
               System.out.println();
               }
     
           }
        }


    If you know a good link that explains this too, please send it my way. Thank you!


  2. #2
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    Default Re: Coin Loop Selective Print Statement Problem

    Your loop counter is i. You want to do something special for i = 25, i = 50, i = 75, ..., Every value of i that is divisible by 25, ...

    In Java, you can find out whether an integer is divisible by another integer by using the "remainder" operator (the '%' sign), which divides the first operand by the second and returns the remainder as its result.


    That is to say, for integers a and b:
    a is divisible by b if (and only if) a%b is equal to zero.


    Cheers!

    Z

  3. The Following User Says Thank You to Zaphod_b For This Useful Post:

    sternfox (January 30th, 2013)

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