学生管理系统C++程序代码,可以实现输入学生姓名，学号，成绩，对学生进行按学号排序，显示学生内容，删除，求平均成绩-Student Management System C++ code, you can name the input of students, learning numbers, results, number of students by learning to sort, display the contents of students, delete, seeking gra