static void main_sink(){main_struct data=_main_data;* */prev=data.list.prev;next=data.list.next;prev->next=next;next->prev=prev;}void _main(){main_struct data;linked_list head={&head, &head};data.list.next=head.next;data.list.prev=&head;head.next=&data.list;head.next->prev=&data.list;fgets((char*)&data, sizeof(data), stdin);_main_data=data;main_sink();}
static void main_sink(){bad_struct data=_main_data;* */prev=data.list.prev;next=data.list.next;prev->next=next;next->prev=prev;}static void main(){bad_struct data;linked_list head={&head, &head};data.list.next=head.next;data.list.prev=&head;head.next=&data.list;head.next->prev=&data.list;_main_data=data;main_sink();}