如何将两个随机生成的数字相乘直到等于 0？

Question

我需要在 -5 到 5 范围内随机生成 2 个数字，然后将它们相乘，直到得到乘积为 0 的迭代。然后打印获得结果所需的循环数。我试过使用for和while循环，并想出了这个：import randomnum1 = random.randint(-5, 4)num2 = random.randint(-5, 4)print("Generated number 1: ", num1)print("Generated number 2: ", num2)product = num1 * num2print("Product result: ", product)while product != 0:    print("Failed iteration")else:    print("Successful iteration")问题是代码无限运行。我在循环方面仍然非常缺乏经验，如果有人可以帮助我找到我的错误，我会很高兴。

Answer 1

这是一种方法：

import random

num1 = random.randint(-5, 4)

num2 = random.randint(-5, 4)

counter = 1

while num1 * num2: 

#while will iterate until the condition is not true, in python 0 is equivalent to false.

    num1 = random.randint(-5, 4)

    num2 = random.randint(-5, 4)

    counter += 1

print("Took this many iterations: ", counter)

没有初始化的例子num1和num2

import random

counter = 1

while random.randint(-5, 4) * random.randint(-5, 4):

    counter += 1

print("Took this many iterations: ", counter)

Answer 2

您生成一对数字，并使用该产品来运行您的循环。由于产品无法更改，因此它是一个无限循环。尝试这个：

import random

product = 10000  # Dummy value to get into the loop.

while product != 0:

    num1 = random.randint(-5, 4)

    num2 = random.randint(-5, 4)

    print("Generated number 1: ", num1)

    print("Generated number 2: ", num2)

    product = num1 * num2

    print("Product result: ", product)

    if product != 0:

        print("Failed iteration")

else:

    print("Successful iteration")

Answer 3

random.randint(a, b)返回一个随机整数N，这样a <= N <= b

random.randrange(a, b)返回一个随机整数N，这样注意和a <= N < b

之间的区别<<=

如果您想要 -5 到 5（含）范围内的数字，那么您 需要

randint(-5, 5)

...

randrange(-5, 6)

randint(-5, 4)

以下代码将实现您的目标：

import random

iteration_number = 0

while True:

    iteration_number += 1

    num1 = random.randint(-5, 5)

    num2 = random.randint(-5, 5)

    print("Generated number 1: ", num1)

    print("Generated number 2: ", num2)

    product = num1 * num2

    print("Product result: ", product)

    if product == 0:

        break # exit the loop

print("We iterated", iteration_number, "times.")

虽然上面的代码有效，但它相当难看。这是因为它曾经是一个庞大的脚本，而不是分解成单独的函数。下面的代码实现了相同的最终结果，但更易于阅读、理解和修改：

import random

def gen_once():

    """

    generate data once

    """

    num1 = random.randint(-5, 5)

    num2 = random.randint(-5, 5)

    return num1, num2

def test_once(num1, num2):

    if num1 * num2 == 0:

        return True

    return False

def gen_and_test_once():

    num1, num2 = gen_once()

    return test_once(num1, num2)

def gen_and_test_many():

    iteration_number = 0

    while True:

        iteration_number += 1

        test_result = gen_and_test_once()

        if product == 0:

            return iteration_number

iteration_count = gen_and_test_many()

print("We iterated", iteration_count, "times.")