Example: C program to add two Matrices using Multi-dimensional Arrays

// C program to add two Matrices using Multi-dimensional Arrays
#include <stdio.h>

// It's main function of the program
int main() {
    int rows, columns;
    printf("Enter No. of Row & Column:\n");
    scanf("%d %d", &rows, &columns);

    int matrix_1[rows][columns];
    int matrix_2[rows][columns];
    int matrix_sum[rows][columns];

    // Step-1 Enter the values of first matrix
    printf("\nEnter the values of the first matrix - matrix_1\n");
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < columns; j++) {
            printf("Enter value - M1[%d][%d]: ", i, j);
            scanf("%d", &matrix_1[i][j]);
        }
    }

    // Step-1 Enter the values of second matrix
    printf("\nEnter the values of the second matrix - matrix_1\n");
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < columns; j++) {
            printf("Enter value - M2[%d][%d]: ", i, j);
            scanf("%d", &matrix_2[i][j]);
        }
    }

    // Step-3 Add the matrices M1 & M2 and store these values in another matrices `matrix_sum`
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < columns; j++) {
            matrix_sum[i][j] = matrix_1[i][j] + matrix_2[i][j];
        }
    }

    // Step-4 Final output of the program to print the final matrices
    printf("\nSUM of two matrices matrix_1 & matrix_2\n");
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < columns; j++) {
            printf("%d\t", matrix_sum[i][j]);
        }
        printf("\n");
    }
    return 0;
}