该资料包含了三个小程序，1.二叉树的创建。2.决策树的创建。该程序中用递归的方法创建决策树并求出决策树的高度。3.查找树的最小节点以及树的后续节点。-The material consists of three small programs, 1. Create a binary tree. 2. Create a decision tree. Recursive method used to create the program and find the height of a decision tree. 3. Search the minimum and subsequent nodes of the tree nodes.