Add two matrices

Two matrices can be added only if they have the same order (rows and columns). The sum matrix S has s[i][j] = a[i][j] + b[i][j]. Nested loops read, add and print the matrices.

#include <stdio.h>

int main(void)
{
    int a[10][10], b[10][10], s[10][10], r, c, i, j;
    printf("Enter rows and columns: ");
    scanf("%d %d", &r, &c);
    printf("Enter first matrix:\n");
    for (i = 0; i < r; i++)
        for (j = 0; j < c; j++)
            scanf("%d", &a[i][j]);
    printf("Enter second matrix:\n");
    for (i = 0; i < r; i++)
        for (j = 0; j < c; j++)
            scanf("%d", &b[i][j]);

    for (i = 0; i < r; i++)
        for (j = 0; j < c; j++)
            s[i][j] = a[i][j] + b[i][j];

    printf("Sum of the matrices:\n");
    for (i = 0; i < r; i++) {
        for (j = 0; j < c; j++)
            printf("%5d", s[i][j]);
        printf("\n");
    }
    return 0;
}

Sample run

Input: 2 3 1 2 3 4 5 6 6 5 4 3 2 1

Enter rows and columns: Enter first matrix:
Enter second matrix:
Sum of the matrices:
    7    7    7
    7    7    7