说明：  C语言课程设计学生成绩管理系统 总体设计 一、 当前学生信息 二、学生成绩查询 三、新生插入 四、输出全部学生信息和全部学生成绩
(C language curriculum design students to design a performance management system, the current Student Information Second, their performance query three or four new insert, the output information for all students and all student achievement)