Question

Randomly generate 0, 1, or 2 in a 100 by 100 2d array.
For each entry in the 2d array, count the number of 0’s and 1’s in the surrounding entries.
Save the result in two 2d arrays: one for the number of 0’s, one for the number of 1’s.
For example:
0   0   1
2   1   0
0   0   0

The number of 0’s for a[0][0] is 1; the number of 1’s for a[0][0] is 1;
The number of 0’s for a[0][1] is 2; the number of 1’s for a[0][1] is 2;
The number of 0’s for a[0][2] is 2; the number of 1’s for a[0][2] is 1;
The number of 0’s for a[1][0] is 4; the number of 1’s for a[1][0] is 1;
The number of 0’s for a[1][1] is 6; the number of 1’s for a[1][1] is 1;
The number of 0’s for a[1][2] is 3; the number of 1’s for a[1][2] is 2;
The number of 0’s for a[2][0] is 1; the number of 1’s for a[2][0] is 1;
The number of 0’s for a[2][1] is 3; the number of 1’s for a[2][1] is 1;
The number of 0’s for a[2][2] is 2; the number of 1’s for a[2][2] is 1;

Answer 1

NOTE: Since no language was mentioned I have made this program in Java. To make the program execution easy and output understandable I have taken a 3 by 3 marix. For 100 by 100 matrix just replace the initial values of n1 and n2 by 100.

import java.util.Random;
class Randomly
{
    public static void main(String[]args)
    {

        int a[]={0,1,2};// array for selecting random numbers for our matrix
        int n1, n2;// variables for number of rows and columns of our matrix
        n1=3;
        n2=3;
        int b[][]=new int[n1][n2];// initializing our matrix
        int i, k, j, c1, c2;
        Random r=new Random();
        for(i=0; i<n1; i++)
        {
            for(j=0; j<n2; j++)
            {
                k=r.nextInt(a.length);// assigning random numbers in the matrix
                b[i][j]=k;
            }
        }
        for(i=0; i<n1; i++)// nested loops to print the matrix
        {
            for(j=0; j<n2; j++)
            {
                System.out.print(b[i][j]+" ");
            }
            System.out.println();
        }
        for(i=0; i<n1; i++)// nested loops to count the number of 1's and 0's surrounding an element
        {// first we are checking whether an index is available or not before checking for 1's and 0's
            for(j=0; j<n2; j++)
            {c1=0; c2=0;
                if(j-1>=0)
                {
                    if(b[i][j-1]==1)
                        c1++;
                    if(b[i][j-1]==0)
                        c2++;
                }
                if(i-1>=0&&j-1>=0)
                {
                    if(b[i-1][j-1]==1)
                        c1++;
                    if(b[i-1][j-1]==0)
                        c2++;
                }
                if(i-1>=0)
                {
                    if(b[i-1][j]==1)
                        c1++;
                    if(b[i-1][j]==0)
                        c2++;
                }
                if(i-1>=0&&j+1<n2)
                {
                    if(b[i-1][j+1]==1)
                        c1++;
                    if(b[i-1][j+1]==0)
                        c2++;
                }
                if(j+1<n2)
                {
                    if(b[i][j+1]==1)
                        c1++;
                    if(b[i][j+1]==0)
                        c2++;
                }
                if(i+1<n1&&j+1<n2)
                {
                    if(b[i+1][j+1]==1)
                        c1++;
                    if(b[i+1][j+1]==0)
                        c2++;
                }
                if(i+1<n1)
                {
                    if(b[i+1][j]==1)
                        c1++;
                    if(b[i+1][j]==0)
                        c2++;
                }
                if(i+1<n1&&j-1>=0)
                {    
                    if(b[i+1][j-1]==1)
                        c1++;
                    if(b[i+1][j-1]==0)
                        c2++;
                }

                System.out.println("The number of 0's for a["+i+"]"+"["+j+"]"+" is "+c2+" ; the number of 1's for a["+i+"]"+"["+j+"]"+" is "+c1+" ;");
            }
        }
    }//end of main method
}// end of class