Question

java program to add two matrices

Answer 1

Hola

We can add two matrices in java using binary + operator. A matrix is also known as array of arrays. We can add, subtract and multiply matrices.

To subtract two matrices, use - operator. Following is the program to add two matrices of 3 rows and 3 columns.


public class MatrixAdditionExample{
  public static void main(String args[]){
  //creating two matrices    
int a[][]={{1,3,4},{2,4,3},{3,4,5}};   
 int b[][]={{1,3,4},{2,4,3},{1,2,4}};
 //creating another matrix to store the sum of two matrices    
int c[][]=new int[3][3]; 
 //3 rows and 3 columns      
//adding and printing addition of 2 matrices    for(int i=0;i<3;i++){ 
 for(int j=0;j<3;j++){
c[i][j]=a[i][j]+b[i][j];
 //use - for subtraction  System.out.print(c[i][j]+" ");
    }    
System.out.println();//new line   
 }    
}}  

hope u got it

Answer 2

import



java.util.Scanner;



  class AddTwoMatrix




{



public static void main(String args[])




{ int m, n, c, d; Scanner in = new





Scanner(System.in);  





System.out.printl





("Enter the number of rows and columns of matrix"); m = in.nextInt(); n =





in.nextInt();   int first[][] = new int[m][n];





int second[][] = new int[m][n]; int sum[][] = new int[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.nextInt();  





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.nextInt();   for ( c = 0 ; c < m ; c++ ) for ( d = 0 ; d < n ; d++





) sum[c][d] = first[c][d] + second[c][d]; //replace '+'



with '-' to subtract





matrices  




System.out.println("Sum of entered matrices:-");   for ( c = 0 ; c < m ; c++





) { for ( d = 0 ; d < n ; d++ )





System.out.print(sum[c][d]+"\t");  





System.out.println(); } } }