Question

Write a java program that will read the values for 3 matrices A, B, and C and store the result of their summation in matrix D. You need to use a method to read matrix values. Use another method to add the three 3x3 matrices (each is a 2 dimensional array with 3 rows and 3 columns). Finally, use a third method to print the value of the summation (matrix D). Write a test program that will cal the three methods.

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
_________________

// MatrixAddition.java

import java.util.Scanner;

public class MatrixAddition {

   /*
   * Creating an Scanner class object which is used to get the inputs
   * entered by the user
   */
   static Scanner sc = new Scanner(System.in);
   public static void main(String[] args) {
int matrix1[][]=new int[3][3];
int matrix2[][]=new int[3][3];
int matrix3[][]=new int[3][3];
System.out.println("Enter Matrix A:");
readMatrix(matrix1);
System.out.println("Enter Matrix B:");
readMatrix(matrix2);
System.out.println("Enter Matrix C:");
readMatrix(matrix3);
int matrix4[][]=addThreeMatrices(matrix1,matrix2,matrix3);
System.out.println("Displaying the sum of 3 matrices:");
displayResult(matrix4);
   }

   private static void displayResult(int[][] matrix4) {
       for(int i=0;i<matrix4.length;i++)
       {
           for(int j=0;j<matrix4[0].length;j++)
           {
               System.out.print(matrix4[i][j]+"\t");
           }
          
           System.out.println();
       }
      
   }

   private static int[][] addThreeMatrices(int[][] matrix1, int[][] matrix2,
           int[][] matrix3) {
       int res[][]=new int[3][3];
       for(int i=0;i<3;i++)
       {
           for(int j=0;j<3;j++)
           {
               res[i][j]=matrix1[i][j]+matrix2[i][j]+matrix3[i][j];
           }
       }
       return res;
   }

   private static void readMatrix(int[][] matrix) {
       for(int i=0;i<matrix.length;i++)
       {
           for(int j=0;j<matrix[0].length;j++)
           {
               matrix[i][j]=sc.nextInt();
           }
       }
      
   }

}

_________________________

Output:

Enter Matrix A:
1 2 3
2 3 4
3 4 5
Enter Matrix B:
1 2 3
2 3 4
3 4 5
Enter Matrix C:
4 5 6
5 6 7
6 7 8
Displaying the sum of 3 matrices:
6   9   12  
9   12   15  
12   15   18  

_______________Could you plz rate me well.Thank You