Performing_All_Operations_on_Matrix .c

#include <stdio.h>
int main()
{
    int i, j, s1 = 0, s2 = 0, s3 = 0, s4 = 0, order, a[10][10], b[10][10], c[10][10], d[10][10], e[10][10];
    printf("\n Enter The Order of Matrix: \n");
    scanf("%d", &order);
    printf("\n Enter The Elements of  Matrix of Order %d X %d : \n", order, order);
    for (i = 0; i < order; i++)
    {
        for (j = 0; j < order; j++)
        {
            scanf("%d", &a[i][j]);
        }
        printf("\n");
    }
    printf("-----------------------------------------------");

    printf("\n Principal Diagonal Elements Are :\n");
    for (i = 0; i < order; i++)
    {
        for (j = 0; j < order; j++)
        {
            if (i == j)
            {
                c[i][j] = a[i][j];
            }
            else
                c[i][j] = 0;
        }
    }
    for (i = 0; i < order; i++)
    {
        for (j = 0; j < order; j++)
        {
            printf("%d  ", c[i][j]);
            s1 = s1 + c[i][j];
        }
        printf("\n");
    }
    printf("\n Sum of Principal Diagonal Elements is: %d\n\n", s1);
    printf("----------------------------------------------\n");
    printf("\n Non-Principal Diagonal Elements are: \n");
    for (i = 0; i < order; i++)
    {
        for (j = 0; j < order; j++)
        {
            if (i + j == order - 1)
            {
                d[i][j] = a[i][j];
            }
            else
                d[i][j] = 0;
        }
    }
    for (i = 0; i < order; i++)
    {
        for (j = 0; j < order; j++)
        {

            printf("%d  ", d[i][j]);
            s2 = s2 + d[i][j];
        }
        printf("\n");
    }
    printf("\n Sum of Non-Principal Diagonal Elements is: %d\n\n", s2);
    printf("----------------------------------------------\n");
    for (i = 0; i < order; i++)
    {
        for (j = 0; j < order; j++)
        {
            if (i < j)
            {
                b[i][j] = a[i][j];
            }
            else
                b[i][j] = 0;
        }
    }
    printf("\n Upper Triangular Matrix is: \n");
    for (i = 0; i < order; i++)
    {
        for (j = 0; j < order; j++)
        {
            printf("%d  ", b[i][j]);
            s3 = s3 + b[i][j];
        }
        printf("\n");
    }
    printf("\n Sum of Upper Triangular Matrix is: %d ", s3);
    printf("\n----------------------------------------------\n");
    for (i = 0; i < order; i++)
    {
        for (j = 0; j < order; j++)
        {
            if (i > j)
            {
                e[i][j] = a[i][j];
            }
            else
                e[i][j] = 0;
        }
    }
    printf("\n Lower Triangular Matrix is: \n");
    for (i = 0; i < order; i++)
    {
        for (j = 0; j < order; j++)
        {
            printf("%d  ", e[i][j]);
            s4 = s4 + e[i][j];
        }
        printf("\n");
    }
    printf("\n Sum of Lower Triangular Matrix is: %d ", s4);
}