说明：  编程建立学生成绩管理系统。要求具有以下功能：一个学生的信息包括学号、姓名、英语成绩、语文成绩、数学成绩，要求输入每位学生的信息并显示这些信息；同时计算每位学生的总分即英语、语文、数学成绩之和，并对输入的若干学生按总分排名，按总分名次输出每位学生及其信息；最后计算这些学生的英语平均分、语文平均分和数学平均分，并输出结果。
(Programming build student achievement management system. Requires the following features: a student information including student number, name, English achievement, language achievement, mathematics achievement, asked to enter each student' s information and displays the information also calculated the total score for each student that is in English, Language, Mathematics results of and, and enter the number of students ranked by total score, according to the overall ranking for each student and the information output finally calculate the average of English, language and math average score average score, and output.)