用C语言建立一个班级成绩管理系统，其中包括十名学生的相关数据（包括学号、姓名、三门课程的成绩、总成绩、平均成绩以及排名）。要求用单链表存储结构进行存储，能够实现对学生姓关数据的输入输出，并且能根据平均成绩对十名学生进行排序。-C language classes to establish a performance management system, including 10 students of relevant data (including school, names of the three courses results, with a total score, average scores and rankings). Single-Chain request storage structure for storage, can be achieved to students surnamed Guan data input and output, and based on the average results of 10 students ranking.