1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
main()4 int main ()
5 {
6 struct base {
7   int basic;
8 };
9 
10 struct derived {
11   struct base common;
12   char extra;
13 };
14 
15 struct derived d;
16 struct base *bp;
17 
18 bp = (struct base *)&d;
19 
20 bp->basic = 10;
21 ((struct derived *)bp)->extra = 'x';
22 return 0;
23 }
24