学生成绩管理系统，包含添加、删除、修改、清空、分段统计、学科排名、查询等功能，且实现了对文件读取的操作。提供一种以MFC为类库框架的对话框程序设计思路。-Student achievement management system, including add, delete, modify, clear, segmented statistics, academic ranking, query and other functions, and to achieve the operation