读入成绩并存入一文件中，包括学号、姓名、平时成绩、实验成绩、考试成绩和总评成绩，其中总评成绩=平时成绩*10 +实验成绩*30 +考试成绩*60 ，总评成绩不要输入通过计算得到；计算、存储并输出成绩分布、平均成绩与均方差；计算、存储并输出你的学号、姓名、成绩与排名。-Read into the results and placed in a file, including the student number, name, usually results, test results, test scores and total grades, which usually results total grades = 10 + test results*** 30 + 60　examination results, General Comments Results do not enter by calculation　computing, storage and output scores, average scores and standard deviation　computing, storage and output of your student number, name, score and ranking.