说明：  大家在改改就能交作业了下面上源码： 文件包括： C语言课程设计指导书 文件源码 18信管x班第y组-C语言课程设计报告 学生信息管理系统模块及其关系
(You can hand in the following source code after modification: Documents include: C language course design guide File source Curriculum design report of group y-c of class X of information management The module of student information management system and its relationship)