纯C++语言编写的小型的学生管理系统 用二叉树实现学生相关属性包括姓名,年龄,房间号的保存,使显示按学号降序排列,并能够保存成文件.-pure C language prepared by the small student management system to achieve binary tree with the students relevant attributes including name, age, the preservation of the room, showi