linux下的gcc编译器

				#include 								static struct sss{				  char f;				  char :0;				  int i;				} sss;								#define _offsetof(st,f) ((char *)&((st *) 16)->f - (char *) 16)								int main (void) {				  printf ("+++char zerofield inside struct starting with char:\n");				  printf ("size=%d,align=%d\n", sizeof (sss), __alignof__ (sss));				  printf ("offset-char=%d,offset-last=%d,\nalign-char=%d,align-last=%d\n",				          _offsetof (struct sss, f), _offsetof (struct sss, i),				          __alignof__ (sss.f), __alignof__ (sss.i));				  return 0;				}