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