Question

*****IN JAVA*****

A run is a sequence of adjacent repeated values. Write a code snippet that generates a sequence of 20 random die tosses in an array and that prints the die values, marking the runs by including them in parentheses, like this:

1 2 (5 5) 3 1 2 4 3 (2 2 2 2) 3 6 (5 5) 6 (3 3)

Use the following pseudocode:

inRun = false

for each valid index i in the array

If inRun

If values [i] is different from the preceding value

Print )

inRun = false

If not inRun

If values[i] is the same as the following value

Print (

inRun = true

Print values[i]

//special processing to print last value

If inRun and last value == previous value, print  “ “ + value + “)”)

else if inRun and last value != previous value, print  “) “ + value )

else print “ “ + last value

Answer 1

Solution:

I have used the given pseudocode.

I also added some changes for formatted printing and removing exceptions.

Code:

import java.util.*;


public class Run 
{
    public static void main(String[] args) 
    {
        int i;
        Random rand = new Random();
        int[] die = new int[20];
        for (i = 0; i < die.length; i++) 
            die[i] = rand.nextInt(6)+1;
        boolean inRun = false;
        
        for (i = 0; i < die.length-1; i++) 
        {
                if(inRun)
                {
                        if( i>0 && die[i]!=die[i-1])
                        {
                                System.out.print(")");
                                inRun = false;
                        }
                        else
                                System.out.print(" ");
                }
                if(!inRun)
                {
                        if(i>0)
                                System.out.print(" ");
                        if(die[i]==die[i+1])
                        {
                                System.out.print("(");
                                inRun = true;
                        }
                        
                }
                System.out.print(die[i]);       
                
        }
        if(inRun && die[die.length-1] == die[die.length-2])
        {
                System.out.print(" "+ die[die.length-1] + ")");
        }
        else if(inRun && die[die.length-1] != die[die.length-2])
        {
                System.out.print(")"+ die[die.length-1]);
                }
        else 
        {
                System.out.print(" " + die[die.length-1]);
        }
            
    }
}

Output of 5 random runs:

Note:Each line is an output of seperate runs.

1 2 6 1 (4 4 4) 6 4 2 3 1 (4 4) 6 2 (5 5) 2 1

3 6 1 (3 3) 1 5 2 5 2 1 (3 3) (2 2) 3 1 2 (3 3)

1 (2 2) 1 5 4 5 1 5 3 4 6 4 2 3 (1 1) 6 4 1

3 1 (5 5 5 5 5) 2 4 1 5 4 2 3 6 (3 3) 2 6 1

6 (4 4) 5 1 5 2 (1 1 1 1) (3 3) 4 5 1 4 (1 1)4