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