目录带头结点的双向循环链表基本操作创建销毁打印尾插法尾删头插头删查找元素位置任意位置插入任意位置删除完整代码及测试总结带头结点的双向循环链表
Picture a terminal. There are two windows inside that terminal. One on top, one on bottom. The top one is much bigger. The top one receives asynchronous updates. The bottom one is for user input.