Home > Article > Backend Development > python里对list中的整数求平均并排序
问题
定义一个int型的一维数组,包含40个元素,用来存储每个学员的成绩,循环产生40个0~100之间的随机整数,
(1)将它们存储到一维数组中,然后统计成绩低于平均分的学员的人数,并输出出来。
(2)将这40个成绩按照从高到低的顺序输出出来。
解决(python)
#! /usr/bin python #coding:utf-8 from __future__ import division #实现精确的除法,例如4/3=1.333333 import random def make_score(num): score = [random.randint(0,100) for i in range(num)] return score def less_average(score): num = len(score) sum_score = sum(score) ave_num = sum_score/num less_ave = [i for i in score if i<ave_num] return len(less_ave) if __name__=="__main__": score = make_score(40) print "the number of less average is:",less_average(score) print "the every socre is[from big to small]:",sorted(score,reverse=True)