Question

Exercise 3: Write a method to add two matrices. The header of the method is: I public static double[][] addMatrix(double [ ][] a, double[][] b) In order to be added, the two matrices must have the same dimensions and the same or compatible types of elements. Let e be the resulting matrix. Each element c is c -a, +b For example, for two 3x3 matrices a and b, c is Write a test program that (a) prompts the user to enter two 3x3 matrices, (b) displays their sum, and (c) prints the row that has the smallest sum in matrix c. Here is a sample run: Computer Programming 04/01/2019 Enter matrixi: 98 765432 Enter matrix2: 6.3 8.2 7.15892.5 4.2 1.7 The addition of the matrices is 9.0 8.8 7.8 6.3 8.2 7.1 15.3 16.2 14.1 68 5.8 4.8+5.8 8.89.811. 13. 13.8 3.อ 2.อ1.8 2.5 4.2 1.7 5.5 6.2 2.7 Row 2 has the minimum sum of 14.4

Answer 1

    import java.util.Scanner;
   
    class AddMat
    {
       public static void main(String args[])
       {
          int m, n, c, d;
          int s1=0,s2=0,s3=0;
          Scanner in = new Scanner(System.in);
       
          System.out.println("Enter the size of matrix");
          m = in.nextInt();
          n = in.nextInt();
       
          double first[][] = new double[m][n];
          double second[][] = new double[m][n];
          double sum[][] = new double[m][n];
       
          System.out.println("Enter the elements of first matrix");
       
          for (c = 0; c < m; c++)
             for (d = 0; d < n; d++)
                first[c][d] = in.nextDouble();
             
          System.out.println("Enter the elements of second matrix");
       
          for (c = 0 ; c < m ; c++)
             for (d = 0 ; d < n ; d++)
                second[c][d] = in.nextDouble();
             
          for (c = 0; c < m; c++)
             for (d = 0; d < n; d++)
                 sum[c][d] = first[c][d] + second[c][d];
   
          System.out.println("Sum of the matrices:");
       
          for (c = 0; c < m; c++)
          {
             for (d = 0; d < n; d++)
                System.out.print(sum[c][d]+"\t");
               System.out.println();
          }
          for (c = 0; c < m; c++)
          {
             for (d = 0; d < n; d++)
                s1+=sum[0][d];
                s2+=sum[1][d];
                s3+=sum[2][d];
          }
          if(s1<s2 && s1<s3)
          {
              System.out.println("Row 1 has minimum sum"+s1);
          }
          else if(s2<s1 && s2<s3)
          {
              System.out.println("Row 2 has minimum sum"+s2);
          }
          else
          {
              System.out.println("Row 3 has minimum sum"+s3);
          }
       }
    }