#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main ()
{
struct foo {
  int zoo;
  int bar [10];
  float baz;
};

#define offsetof(S,F) ((size_t) & (((S *) 0)->F))

struct foo *k = (struct foo *) malloc (offsetof (struct foo, bar[4]));
k->bar[1] = 9;
free (k);
return 0;
}