学生成绩管理系统，是我的课程设计，可对输入的学生成绩数据进行处理，算出每人平均分、各科平均分、排名及算出各分数段人数等等。-Student performance management system, it is my course design,it can　calculate average per person, all branches of the average, rankings and calculate the number of the band, and so on.