1 #include <stdio.h>
2 
3 static class sss {
4 public:
5   char * m;
6   virtual int f (int i) {return i;}
7 } sss;
8 
9 #define _offsetof(st,f) ((char *)&((st *) 16)->f - (char *) 16)
10 
11 int main (void) {
12   printf ("+++Class starting with pointer and containing virtual function:\n");
13   printf ("size=%d,align=%d\n", sizeof (sss), __alignof__ (sss));
14   printf ("offset-m=%d,align-m=%d\n",
15           _offsetof (class sss, m), __alignof__ (sss.m));
16 }
17