本代码为C++的二叉树课设，内容包括复杂的建树过程，递归遍历及非递归遍历，还有二叉树形态的打印，功能还是比较全的-The code for C++ binary tree class-based, including the achievements of complex processes, recursive and non-recursive traversal traversal, as well as binary form printing function is still rel