链表

单链表

	+--------------+---+
	|      data    | * |
	+--------------+-┼-+
					 |
					 |
					 |
			+--------V-----+---+
			|      data    | * |
			+--------------+-┼-+
							 |
							 |
							 |
					+--------V-----+---+
					|      data    | Ø |
					+--------------+---+