二叉树的C++实现，成员可以自己调整，实现了各种修剪此树的方法：初始化，增加节点，删去节点，复制树，读取节点，遍历树-Binary tree in C++, members can make their own adjustments to achieve a variety of pruning this tree methods: initialize, add nodes, delete nodes, copy the tree, read the node, traverse the t