此程序通过了建立学生信息，对学生信息进行统计分析得到结果。主要有以下功能:输入学生信息、总成绩排名、查询及格比例、查询不及格比例以及学生成绩档次比例。-This program through the establishment of student information, student information for statistical analysis of the results obtained. Has the following functions: input studen