Question

以下是具体问题：使用函数编写程序以生成许多随机数并确定：

1.生成正值的数量，

2.零值的数量，

3.生成的负值数量

4.平均值为浮点数到一位十进制数

到目前为止，我已经能够生成随机数，而且就此而言

import random 
def randomNum (x):
    counter = 0
    zerocounter = 0
    while counter <= x:
        t = random.randint(-x,x)
        if t == 0:
           zerocounter = zerocounter + 1
        a = t/x
        print(t)
        average = average + a
        counter = counter + 1
    return average,zerocounter

number = int(input("input max range of numbers "))
average,zerocounter = randomNum(number)
print(average)
print(zerocounter)

我已经想出如何计算零和平均值我只需要整数和负数的帮助

Answer 1

这是一个代码演示：

In [59]: number = int(input("input max range of numbers: "))
    ...: howmany = int(input("how many numbers to generate: ")) #use another variable
    ...: rand_nums=[random.randint(-number, number) for i in range(howmany)]
    ...: #pos_cnt=sum(1 for i in rand_nums if i>0)  #one liner to count the postive ints inside the list.
                                                    #Otherwise use a loop as below
    ...: pos_cnt=neg_cnt=zero_cnt=0 #use 3 separate counters
    ...: for i in rand_nums:
    ...:     if i>0:
    ...:         pos_cnt+=1
    ...:     elif i==0:
    ...:         zero_cnt+=1
    ...:     else:
    ...:         neg_cnt+=1
    ...: print(rand_nums)
    ...: print('there are {} postive ints, {} zeros, {} negative ints'.format(pos_cnt, zero_cnt, neg_cnt))
    ...: print('list mean is:', 1.0*sum(rand_nums)/len(rand_nums))

#sample input & output:
input max range of numbers: 111

how many numbers to generate: 11
[4, -44, -88, 103, 34, 82, 17, 93, 107, -98, 93]
there are 8 postive ints, 0 zeros, 3 negative ints
list mean is: 27.545454545454547

如何找到随机整数/浮点数/零的数量

1 个答案: