
#include <stdio.h>
#include <stdlib.h>
#define NUMELEM(a) (sizeof(a)/sizeof(a[0]))

main()
{
	int cmpia(const void *, const void *);
	int array[] = {25, 3, 22, -5, 3, 24};
	int i;

	qsort(&array[0], NUMELEM(array), sizeof(int), cmpia);

	printf("ascending integer order\n");
	for (i = 0; i < NUMELEM(array); ++i)
		printf("array[%d] = %2d\n", i, array[i]);

	return 0;
}

/* compare ints in ascending order */

int cmpia(const void *pe1, const void *pe2)
{
	const int *pi1 = pe1;
	const int *pi2 = pe2;

	if (*pi1 < *pi2)
		return -1;
	else if (*pi1 == *pi2)
		return 0;
	else
		return 1;
}

ascending integer order
array[0] = -5
array[1] =  3
array[2] =  3
array[3] = 22
array[4] = 24
array[5] = 25

