15.c

#include <stdio.h>

int main()
{
    int siz, i, j;
    printf("Enter Size of Square Matrix: ");
    scanf("%d", &siz);

    int matrixA[siz][siz], matrixB[siz][siz];

    printf("\nEnter Values For Matrix A:\n");
    for (i = 0; i < siz; i++)
    {
        for (j = 0; j < siz; j++)
        {
            printf("Position (%d, %d): ", i + 1, j + 1);
            scanf("%d", &matrixA[i][j]);
        }
    }

    printf("\nEnter Values For Matrix B:\n");
    for (i = 0; i < siz; i++)
    {
        for (j = 0; j < siz; j++)
        {
            printf("Position (%d, %d): ", i + 1, j + 1);
            scanf("%d", &matrixB[i][j]);
        }
    }

    printf("\nSummation of Matrix A & Matrix B:\n");
    for (i = 0; i < siz; i++)
    {
        printf("\t|");
        for (j = 0; j < siz; j++)
        {
            printf("%6d", matrixA[i][j] + matrixB[i][j]);
        }
        printf("\t|\n");
    }

    printf("\nSubtraction of Matrix B from Matrix A:\n");
    for (i = 0; i < siz; i++)
    {
        printf("\t|");
        for (j = 0; j < siz; j++)
        {
            printf("%6d", matrixA[i][j] - matrixB[i][j]);
        }
        printf("\t|\n");
    }

    return 0;
}