打印单链表的倒数第k个结点

link find_reverse(int k)
{
	int i = 0;
	link p = NULL;
	link q= NULL;
	p = head;
	q = head;
	for(i = 0; i < k &&p; i++,p = p->next);
	if(p == NULL)
		return NULL;
	for(;p;p = p->next,q = q->next);
	return q;
}