基于C语言设计的学生成绩管理系统，主要功能:

1)能按班级完成对学生成绩的录入,修改

2)能按班级统计学生的成绩,求学生的总分很平均分,并能根据学生的平均成绩进行成绩的排序

3)能按学号查询学生成绩.不及格科目!-C-based design of student achievement management system, the main functions: 1) can be completed according to the class achievement of students input, modification 2) can student performance statistics by class, find the students overall score is average, and according to the students grade point average ranking of 3 for results) can learn for inquiry by student performance. do not pass the subject!