输入N个学生的姓名和学号以及每个学生考试N门功课的成绩，编程计算出每个学生的总分、平均分以及总学生的总分与平均分 ，同时按学生平均成绩优劣排序。-Results, enter the the N student' s name and student number, and each student exam N homework programming to calculate the total score of each student, average and total score and the average total students, sorted according to students'　grade point average pros and cons .