C++ Program to Add Two Matrix Using Multi-dimensional Arrays

In the following example of C++ program that adds two matrices using multi-dimensional arrays :

Program :

#include <iostream>
using namespace std;

const int MAX = 10;

int main() {
   int matrix1[MAX][MAX], matrix2[MAX][MAX], sum[MAX][MAX];
   int rows, cols, i, j;

   cout << "Enter number of rows and columns of matrix: ";
   cin >> rows >> cols;

   cout << "Enter elements of matrix1:" << endl;

   for(i=0; i<rows; i++) {
      for(j=0; j<cols; j++) {
         cin >> matrix1[i][j];
      }
   }

   cout << "Enter elements of matrix2:" << endl;

   for(i=0; i<rows; i++) {
      for(j=0; j<cols; j++) {
         cin >> matrix2[i][j];
      }
   }

   for(i=0; i<rows; i++) {
      for(j=0; j<cols; j++) {
         sum[i][j] = matrix1[i][j] + matrix2[i][j];
      }
   }

   cout << "Sum of matrices:" << endl;

   for(i=0; i<rows; i++) {
      for(j=0; j<cols; j++) {
         cout << sum[i][j] << " ";
      }
      cout << endl;
   }

   return 0;
}

* In this program, we declare three 2D arrays matrix1, matrix2, and sum of size MAX x MAX. We also declare variables for the number of rows and columns in the matrix.

* We then take input from the user for the elements of both matrices using nested for loops.

* Next, we add the corresponding elements of the two matrices to get the sum matrix. This is done using another nested for loop.

* Finally, we print the sum matrix using nested for loops.

Output :

Enter number of rows and columns of matrix: 2 3
Enter elements of matrix1:
4 9 12
1 7 5
Enter elements of matrix2:
3 17 6
9 4 2
Sum of matrices:
7 26 18 
10 11 7