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#! /usr/bin/env python

#coding:utf-8

"""

问题

定义一个20*5的二维数组，用来存储某班级20位学员的5门课的成绩；这5门课按存储顺序依次为：core C++，coreJava，Servlet，JSP和EJB。

（1）循环给二维数组的每一个元素赋0~100之间的随机整数。

（2）按照列表的方式输出这些学员的每门课程的成绩。

（3）要求编写程序求每个学员的总分，将其保留在另外一个一维数组中。

（4）要求编写程序求所有学员的某门课程的平均分。

"""

from __future__ import division

import random

def score(score_list,course_list,student_num):

course_num = len(course_list)

every_score = [[score_list[j][i] for j in range(course_num)] for i in range(student_num)]

every_total = [sum(every_score[i]) for i in range(student_num)]

ave_course = [sum(score_list[i])/len(score_list[i]) for i in range(len(score_list))]

return (every_score,every_total,ave_course)

if __name__=="__main__":

course_list = ["C++","Java","Servlet","JSP","EJB"]

student_num = 20

score_list = [[random.randint(0,100) for i in range(student_num)] for j in range(len(course_list))]

for i in range(len(course_list)):

print "score of every one in %s:"%course_list[i]

print score_list[i]

every_score,every_total,ave_one_course = score(score_list,course_list,student_num)

print "\n"

print "NEXT IS EVERY ONE SCORE IN EVERY COURSE:"

for name in course_list:

print name,

print "\t"

print every_score

print "\n"

print "every one all score:\t",every_total

print "every course of average score:\t",ave_one_course