Pointers to Functions bubble Program example 4 in C programming language

 Pointers to Functions bubble Program Example 4 : 

 /*------------------ bubble_4.c ----------------------------*/

/* Program bubble_4.c from PTRTUT10,HTM   6/13/97 */

#include <stdio.h>
int arr[10] = { 3,6,1,2,3,8,4,1,7,2};

void bubble(int *p, int N);
int compare(void *m, void *n);

int main(void)
{
    int i;
    putchar('\n');

    for (i = 0; i < 10; i++)
    {
        printf("%d ", arr[i]);
    }
    bubble(arr,10);
    putchar('\n');

    for (i = 0; i < 10; i++)
    {
        printf("%d ", arr[i]);
    }
    return 0;
}

void bubble(int *p, int N)
{
    int i, j, t;
    for (i = N-1; i >= 0; i--)
    {
        for (j = 1; j <= i; j++)
        {
            if (compare((void *)&p[j-1], (void *)&p[j]))
            {
                t = p[j-1];
                p[j-1] = p[j];
                p[j] = t;
            }
        }
    }
}

int compare(void *m, void *n)
{
    int *m1, *n1;
    m1 = (int *)m;
    n1 = (int *)n;
    return (*m1 > *n1);
}

/*------------------ end of bubble_4.c ---------------------*/