#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#define   N   50000

void   quicksort(int *, int *);

int main(void)
{
   int    a[N], i;

   srand(time(NULL));
   for (i = 0; i < N; ++i)
      a[i] = rand() % 10000;
   quicksort(a, a + N - 1);
   for (i = 0; i < N - 1; ++i)
      if (a[i] > a[i + 1]) {
	 printf("SORTING ERROR - bye!\n");
	 exit(1);
      }
   return 0;
}