typedef struct CLinkList
{
	int data;
	struct CLinkList* next;
}node;
typedef struct CLinkList* LinkList;
int compareStep(LinkList L)
{
	LinkList cur1 = L;//定義結點cur1
	int pos1 = 0;//cur1的步數

	while(cur1)
	{
		LinkList cur2 = L;//定義結點cur2
	    int pos2 = 0;//cur2的步數
		while(cur2)
		{
			if(cur1==cur2)
			{
				if(pos1==pos2)break;
				else 
				{
					printf("環的位置在第%d個結點處。\n",pos2);
					return 1;
				}
			}
			cur2 = cur2 ->next;
			pos2++;
		}
		    cur1 = cur1->next;
			pos1++;
	}
	return 0;
}