双链表的逆转实现

my_list* reverse(my_list *list)
{
	if(list == NULL)
		return NULL;
	my_list *pre = NULL,*cur = list->next,*nex = NULL;
    while(cur)
	{
		nex = cur->next;
		cur->next = pre;
		pre = cur;
		cur = nex;
	}
	return pre;
}

好像还是有问题，在研究下！