Given a 2D array a, sum up ALL the edges of the array. Ex. int a[...

Given a 2D array a, sum up ALL the edges of the array.

Ex. int a[ ][ ] = { {1, 2, 3, 4},

{5, 6, 7, 8},

{9, 10, 11, 12} };

OUTPUT: Sum of the edges = 65

Expert Solution

CODE IN JAVA:

import java.util.Scanner;

public class CellPhoneService {

   public static void main(String[] args) {

       int arr[][] = { {1, 2, 3, 4},{5, 6, 7, 8},{9, 10, 11, 12}};
       int rows = arr.length ;
       int cols = arr[0].length ;
       int sum = 0 ;
       for(int i = 0 ; i < cols; i++) {
           sum += arr[0][i] ;
           sum += arr[rows-1][i];
       }
       for(int j = 1; j < rows-1; j++) {
           sum += arr[j][0];
           sum += arr[j][cols-1];
       }
       System.out.println("Sum of edges : " + sum);



   }

}

OUTPUT:

venereology answered 11 months ago

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