Example: Addition and Subtraction of Two Matrices in C using Array

// Online C Compiler
#include <stdio.h>

int main()
{
    int x1, x2, row, col;
    printf("Enter the number of rows & columns of Matrix:\n");
    scanf("%d%d", &x1, &x2);

    int first_matrix[x1][x2], second_matrix[x1][x2], sum_matrix[x1][x2], diff_matrix[x1][x2];

    printf("\nEnter the %d elements of the first array:\n", x1 * x2);
    for (row = 0; row < x1; row++)
    {
        for (col = 0; col < x2; col++)
        {
            scanf("%d", &first_matrix[row][col]);
        }
    }

    printf("\n\nEnter the %d elements of the second array:\n", x1 * x2);
    for (row = 0; row < x1; row++)
    {
        for (col = 0; col < x2; col++)
        {
            scanf("%d", &second_matrix[row][col]);
        }
    }

    /* Make the sum of two matrices and store in another matrix named - sum_matrix */
    printf("\n\nThe sum of first & second matrices:\n");
    for (row = 0; row < x1; row++)
    {
        for (col = 0; col < x2; col++)
        {
            sum_matrix[row][col] = first_matrix[row][col] + second_matrix[row][col];
            printf("%d\t", sum_matrix[row][col]);
        }
        printf("\n");
    }

    /* Make the subtraction of two matrices and store in another matrix named - diff_matrix */
    printf("\n\nThe subtraction of first & second matrices:\n");
    for (row = 0; row < x1; row++)
    {
        for (col = 0; col < x2; col++)
        {
            diff_matrix[row][col] = first_matrix[row][col] - second_matrix[row][col];
            printf("%d\t", diff_matrix[row][col]);
        }
        printf("\n");
    }
    return 0;
}