## 单链表

特征

- 一个单链表由一些具体的表结点构成；
- 每个结点是一个对象，有自己的标识，也成为链接；
- 结点之间通过结点链接建立起单向的顺序联系。

## 循环单链表



## 双链表



## 循环双链表




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