/* Lecture 1, example 1: Given a two dimentional array table, compute the
   sum of the entries of each row and store the results in one dimentional 
   array sum, as well as the overall total in total_sum. */

class lec1ex1 {
 
   public static void main (String [] args) {

     int[][] table = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}};
     int[] sum = new int[3];
     int total_sum = 0;

     for (int i = 0; i < table.length; i++) {

        sum[i] = 0;

        //compute the sum of all entries of a given row
        for (int j = 0; j < table[i].length; j++) {
 
           sum[i] = sum[i] + table[i][j];
           total_sum = total_sum + table[i][j];
        }

        System.out.println ("The sum of the entries of row " + i +
              " is " + sum[i]);
     }
     System.out.println ("The total sum of entries is " + total_sum);
   }
}