#include <stdlib.h>

int f(int *a)
{
  int (*intcmp)(const void *, const void *);
  void foo(int *);
  int data;

  foo (a);
  qsort (a, 10, sizeof (int), intcmp);

  for (int i = 0; i < 10; ++i)
    if (a[i] > 500)
      data += a[i];

  return data;
}

/*
Optimize to following 2 loops worth it ?
for (int i = 0; a[i] < 501; i++)
  ;
for (; i < 10; i++)
  data += a[i];
*/