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