1.程序完整实现了异质树的遍历，查找，删除，插入 2.继承，虚函数，动态联编 3.DEV-C++编译环境 4.标准输入输出-1. Procedures achieved complete heterogeneous tree traversal, search, delete, insert 2. Inheritance, virtual function, dynamic binding 3.DEV-C++ Compiler environment 4. The standard