实现双链表的基本功能，包括链表的创建和消除，节点的增删改查等功能-Doubly linked list of basic functions, including the creation and the elimination of the linked list node additions and deletions to change search functions

在控制台树形输出二叉树，使用了队列。首先设置叶子节点间的间距，然后以坐标的形似记录下每个节点的位置-Binary output in the console tree, using a queue. The spacing between the first set of leaf nodes, then the coordinates of the shape of the recording position of each node