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