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#include class c{ public: char f; }; static class sss: public c{ public: int m; } sss; #define _offsetof(st,f) ((char *)&((st *) 16)->f - (char *) 16) int main (void) { printf ("++Class with int inhereting class with char:\n"); printf ("size=%d,align=%d\n", sizeof (sss), __alignof__ (sss)); printf ("offset-char=%d,offset-int=%d,\nalign-char=%d,align-int=%d\n", _offsetof (class sss, f), _offsetof (class sss, m), __alignof__ (sss.f), __alignof__ (sss.m)); return 0; }