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Thread: How to make the output side by side. I need HELP!

  1. #1
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    Default How to make the output side by side. I need HELP!

    Okay so I have to find the number of times 2 die land on 2-12 /and the percentage of getting a 1 a 2 and so on rolling it 10million times.

    So far I have this:
    import java.util.Random;
    public class MonteCarlo {
     
    	/**
    	 * @param args
    	 */
    	public static void main(String[] args) {
     
     
     
    		    {  
    		        Random randomNumbers = new Random(); // Generates random numbers  
    		        int[] array = new int[ 13 ]; // Declares the array  
    		        int dice1;  
    		        int dice2;  
     
     
    		        //Roll the die 36,000 times  
    		        for ( int roll = 1; roll <=10000000; roll++ )  
    		        {     
    		            int die1 =  randomNumbers.nextInt ( 6 )+ 1;  
    		            int die2 =  randomNumbers.nextInt ( 6 )+ 1;  
    		            int total = die1 + die2;  
    		            ++array[total];  
     
    		        }  
     
     
    		        // outputs array values  
     
     
     
     
     
     
     
    		        int nRolls = 100, nDice = 6; // default values
     
     
     
    		         nRolls = 10000000;
    		        //10,000,000 rolls of the dice
    		         nDice = 6;
    		         // six sides of the dice
    		        int minSum = 2, maxSum = 2 * nDice;
    		        //lowest sum of dice is two. Max sum is 2 times the number of sides. minSum= 2, maxSum=12
    		        int[] Prop = new int[maxSum - minSum + 1];
     
    		        Random rand = new Random();
    		        //random
    		        for (int iter = 1; iter <= nRolls; iter++) {
    		            int throw1 = 1 + rand.nextInt(nDice), throw2 = 1 + rand.nextInt(nDice);
    		            int sum = throw1 + throw2;
    		            Prop[sum - minSum]++;
    		        }
     
    		        System.out.println("Number of rolls: " + nRolls + " on a six sided dice");
    		        //  Using int nRolls
    		        System.out.println("Number of sides of the dice: " + nDice);
    		        //Usin int nDice
    		        System.out.println("Sum of Dice         Percentage      Number Of Times Rolled");
    		        // created space so it creates space in the output
    		        for (int i = 0; i < Prop.length; i++) 
    		        {
    		        	System.out.println(String.format("   %2d                 %5.2f%%", i + minSum, Prop[i] * 100.0 / nRolls));
    		            // System.out.println("   " + (i+minSum) + "             " + (hist[i]*100.0/nRolls);
    		        }{
    		        for ( int face = 2; face < array.length; face++ )  
    		            System.out.printf( "%4d%10d\n",        face, array[ face ] );  
    		        	}
    		    } // end main  
     
    		    }} // end class DiceRollin


    The output is:
    Number of rolls: 10000000 on a six sided dice
    Number of sides of the dice: 6
    Sum of Dice         Percentage      Number Of Times Rolled
        2                  2.78%                      
        3                  5.56%
        4                  8.32%
        5                 11.11%
        6                 13.90%
        7                 16.67%
        8                 13.88%
        9                 11.11%
       10                  8.33%
       11                  5.55%
       12                  2.78%
     
           555185
         832554
          1111462
          1389278
          1667420
          1389082
         1111436
          832328
          554695
        277347


    As you can see i do not want the numbers 2-12 again. I need the out put to look like THIS:
     
     
    Number of rolls: 10000000 on a six sided dice
    Number of sides of the dice: 6
    Sum of Dice         Percentage      Number Of Times Rolled
        2                  2.78%                          279213
        3                  5.56%                          555185
        4                  8.32%                          832554
        5                 11.11%                          1111462
        6                 13.90%                          1389278
        7                 16.67%                          1667420
        8                 13.88%                          1389082
        9                 11.11%                          1111436
       10                  8.33%                          832328
       11                  5.55%                           554695
       12                  2.78%                           277347


    Please any advice would help.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: How to make the output side by side. I need HELP!

    Is the problem with the output that the Number Of Times Rolled is not on the same row with the other two values?

    Where do you format the line for printing? Why don't you add that third item to the data that is on the row?
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: How to make the output side by side. I need HELP!

    Sorry i made a mistake in copying my output...It looks like this and i want it changed to what is above.


    Output so far:
     
    Number of rolls: 10000000 on a six sided dice
    Number of sides of the dice: 6
    Sum of Dice         Percentage      Number Of Times Rolled
        2                  2.77%
        3                  5.56%
        4                  8.35%
        5                 11.13%
        6                 13.89%
        7                 16.67%
        8                 13.89%
        9                 11.10%
       10                  8.32%
       11                  5.55%
       12                  2.77%
       2    278192
       3    556866
       4    832608
       5   1111222
       6   1389046
       7   1666643
       8   1388537
       9   1110083
      10    832644
      11    555531
      12    278628


    --- Update ---

    Why don't you add that third item to the data that is on the row?
    I tried doing that but I get errors. I am probably doing it wrong. Please help. Thanks Norm

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: How to make the output side by side. I need HELP!

    but I get errors
    Please copy the full text of the error messages and paste it here.

    What are the two arrays: (array and Prop) used for? Why do you need two?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: How to make the output side by side. I need HELP!

    you made mistake on your loop. Because you used double for loop
    So process completed the first for loop and print the statement after that that will be go to another one.

    So print your output using single for loop like below...

    for (int i = 0; i < Prop.length; i++) 
    		        {
    		        	System.out.println(String.format("   %2d                 %5.2f%%              %10d  ", i + minSum, Prop[i] * 100.0 / nRolls,array[ i+2 ]));
     
    		        }
    Regards
    Android developer
    Trinay Technology Solutions
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  6. The Following User Says Thank You to Tamilarasi For This Useful Post:

    JAVAHELPP (March 18th, 2013)

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    Default Re: How to make the output side by side. I need HELP!

    Thank you!! I got it now. I don't know why i used a double loop. I'm new to all of this but i get it now.

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