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Thread: Dice Rolling Simulation

  1. #1
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    Default Dice Rolling Simulation

    I have coded a dice rolling simulation to roll a single die 36,000 times, store the data in the array and display how many times the face value landed. My question is what do I need to do to change this to simulate rolling 2 die to display the output of 2-12 face value, so adding the face value of the 2 randomly rolled die and incrementing face value. Here is the code I have for the single die:
    // Dice Rolling
     
    import java.util.Random;
     
    public class DiceRolling
    {
    	public static void main( String[] args)
    	{
    		Random randomNumbers = new Random(); // Generates random numbers
    		int[] array = new int[ 7 ]; // Declares the array
     
    		//Roll the die 36,000 times
    		for ( int roll = 1; roll <=36000; roll++ )
    			++array[ 1 + randomNumbers.nextInt ( 6 ) ];
     
    		System.out.printf( "%s%10s\n", "Face", "Frequency" );
     
    		// outputs array values
    		for ( int face = 1; face < array.length; face++ )
    			System.out.printf( "%4d%10d\n", face, array[ face ] );
     
    	} // end main
     
    } // end class DiceRolling


  2. #2
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    Default Re: Dice Rolling Simulation

    I think I may have a little more information but now I'm getting a dice1 cannot be initialized and I do not believe I am totalling up the two correctly to store them back into the array.
    // Dice Rolling

    import java.util.Random;

    public class DiceRolling
    {
    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;
    int total;

    //Roll the die 36,000 times
    for ( int roll = 1; roll <=36000; roll++ )
    dice1 = 1 + randomNumbers.nextInt ( 6 );
    dice2 = 1 + randomNumbers.nextInt ( 6 );
    total = dice1+dice2;
    ++array[total];

    System.out.printf( "%s%10s\n", "Face", "Frequency" );

    // outputs array values
    for ( int face = 1; face < array.length; face++ )
    System.out.printf( "%4d%10d\n", face, array[ face ] );

    } // end main

    } // end class DiceRolling

  3. #3
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    Default Re: Dice Rolling Simulation

    Solved:
    //Roll the die 36,000 times
    		for ( int roll = 1; roll <=36000; roll++ )
    		{	
    			int die1 = 1 + randomNumbers.nextInt ( 6 );
    			int die2 = 1 + randomNumbers.nextInt ( 6 );
    			int total = die1 + die2;
    			++array[total];
     
    		}

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