如何退出 python 测验

Question

这是我必须做的一个基本数学测验，但我还没有弄清楚如何让游戏退出。 我已经做到了，每当您按 -1 时，您都会退出。 它有效，但仅适用于每三个问题，所以我希望改变它。

我只是一个开始 python 的学生，所以请提出任何建议并解释我做错了什么。 如果您有任何改进的想法，那么我请求您尽可能分享。

import random

print ('Welcome to my quiz. Enter the correct answer for the given math equation.')

print ('Enter -1 to quit')

Score = 0
UserInput = 0
CorrectAnswer = 0
CorrectAnswer2 = 0
CorrectAnswer3 = 0
IncorrectAnswer = 0
num1 = 0
num2 = 0
num3 = 0
num4 = 0
num5 = 0
num6 = 0
ans = 0

while ans != -1:
    print ('\n')
    num1 = random.randint (1,12)
    num2 = random.randint (1,12)
    num3 = random.randint (1,25)
    num4 = random.randint (1,25)
    num5 = random.randint (50,100)
    num6 = random.randint (1,25)
    CorrectAnswer = num1 * num2
    CorrectAnswer2 = num3 + num4
    CorrectAnswer3 = num5 - num6



    print ('What is ', num1, ' x ', num2, '?')
    ans = int (input ('Answer: '))
    if ans == CorrectAnswer:
        print ('Correct! ')
        Score = Score + 1
    else:
        print ('Incorrect')
        print ('The correct answer is: ', CorrectAnswer)
        Score = Score -1

    print ('What is ', num3, ' + ', num4, '?' )
    ans = int (input ('Answer: '))
    if ans == CorrectAnswer2:
        print ('Correct! ')
        Score = Score + 1
    else:
        print ('Incorrect')
        print ('The correct answer is: ', CorrectAnswer2)
        Score = Score -1

    print ('What is ', num5, ' - ', num6, '?' )
    ans = int (input ('Answer: '))
    if ans == CorrectAnswer3:
        print ('Correct! ')
        Score = Score + 1
    else:
        print ('Incorrect')
        print ('The correct answer is: ', CorrectAnswer3)
        Score = Score - 1

    if ans == -1:



print ('\n')
print ('Well done, Your final score is: ', Score)

Answer 1

试试这个代码：

import random

print ('Welcome to my quiz. Enter the correct answer for the given math equation.')

print ('Enter -1 to quit')

Score = 0
UserInput = 0
CorrectAnswer = 0
CorrectAnswer2 = 0
CorrectAnswer3 = 0
IncorrectAnswer = 0
num1 = 0
num2 = 0
num3 = 0
num4 = 0
num5 = 0
num6 = 0
ans = 0


print('\n')
num1 = random.randint (1,12)
num2 = random.randint (1,12)
num3 = random.randint (1,25)
num4 = random.randint (1,25)
num5 = random.randint (50,100)
num6 = random.randint (1,25)
CorrectAnswer = num1 * num2
CorrectAnswer2 = num3 + num4
CorrectAnswer3 = num5 - num6


print ('What is ', num1, ' x ', num2, '?')
ans = int (input ('Answer: '))
if ans != -1:
    if ans == CorrectAnswer:
        print ('Correct! ')
        Score = Score + 1
    else:
        print ('Incorrect')
        print ('The correct answer is: ', CorrectAnswer)
        Score = Score -1

    print ('What is ', num3, ' + ', num4, '?' )
    ans = int (input ('Answer: '))
    if ans == CorrectAnswer2:
        print ('Correct! ')
        Score = Score + 1
    else:
        print ('Incorrect')
        print ('The correct answer is: ', CorrectAnswer2)
        Score = Score -1

    print ('What is ', num5, ' - ', num6, '?' )
    ans = int (input ('Answer: '))
    if ans == CorrectAnswer3:
        print ('Correct! ')
        Score = Score + 1
    else:
        print ('Incorrect')
        print ('The correct answer is: ', CorrectAnswer3)
        Score = Score - 1
else:
    pass


print('\n')
print ('Well done, Your final score is: ', Score)

Answer 2

我使用列表减少了变量的数量。 我还在字符串中添加了 f 标志，以免滥用连接。 总的来说，我稍微改进了你的代码（视觉上）:)

import random
import sys
import time

print ('Welcome to my quiz. Enter the correct answer for the given math equation.')
print ('Enter -1 to quit \n')

Score = 0
ans = None

num = [random.randint(1,12) for i in range(6)]
num[4] = random.randint(50,100)

CorrectAnswers = [
    num[0] * num[1],
    num[2] + num[3],
    num[4] - num[5]]

while True:


    print (f'What is {num[0]} x {num[1]}?')
    ans = int(input('Answer: '))

    if ans == CorrectAnswers[0]:
        print ('Correct!')
        Score += 1
    elif ans == -1:
        break
    else:
        print (f'Incorrect \n The correct answer is: {CorrectAnswers[0]}')
        Score -= 1



    print (f'What is {num[2]} + {num[3]}?' )
    ans = int (input('Answer: '))

    if ans == CorrectAnswers[1]:
        print ('Correct!')
        Score += 1
    elif ans == -1:
        break
    else:
        print (f'Incorrect \n The correct answer is: {CorrectAnswers[1]}')
        Score -= 1


    print (f'What is {num[4]} - {num[5]}?' )
    ans = int(input('Answer: '))

    if ans == CorrectAnswers[2]:
        print ('Correct!')
        Score += 1
    elif ans == -1:
        break
    else:
        print (f'Incorrect \n The correct answer is:  {CorrectAnswers[2]}')
        Score -= 1


print (f'\n Well done, Your final score is: {Score}')
time.sleep(2)
sys.exit()

关于任务。 Python中有很多退出方式，但我还是选择了sys.exit()。 如果你想让这段代码完美，请阅读 Python 中的 OOP 并查看 PEP8，python 语言代码样式。

OOP: https://realpython.com/python3-object-oriented-programming/

代码风格： https://www.python.org/dev/peps/pep-0008/

Answer 3

最简单的方式海事组织。

我刚刚添加了if ans == 1: break after each input 。

import random

print ('Welcome to my quiz. Enter the correct answer for the given math equation.')

print ('Enter -1 to quit')

Score = 0

while True:
    print ('\n')
    num1 = random.randint (1,12)
    num2 = random.randint (1,12)
    num3 = random.randint (1,25)
    num4 = random.randint (1,25)
    num5 = random.randint (50,100)
    num6 = random.randint (1,25)
    CorrectAnswer = num1 * num2
    CorrectAnswer2 = num3 + num4
    CorrectAnswer3 = num5 - num6

    print ('What is ', num1, ' x ', num2, '?')
    ans = int (input ('Answer: '))
    if ans == -1:
        break
    if ans == CorrectAnswer:
        print ('Correct! ')
        Score = Score + 1
    else:
        print ('Incorrect')
        print ('The correct answer is: ', CorrectAnswer)
        Score = Score -1

    print ('What is ', num3, ' + ', num4, '?' )
    ans = int (input ('Answer: '))
    if ans == -1:
        break
    if ans == CorrectAnswer2:
        print ('Correct! ')
        Score = Score + 1
    else:
        print ('Incorrect')
        print ('The correct answer is: ', CorrectAnswer2)
        Score = Score -1

    print ('What is ', num5, ' - ', num6, '?' )
    ans = int (input ('Answer: '))
    if ans == -1:
        break
    if ans == CorrectAnswer3:
        print ('Correct! ')
        Score = Score + 1
    else:
        print ('Incorrect')
        print ('The correct answer is: ', CorrectAnswer3)
        Score = Score - 1

print ('\n')
print ('Well done, Your final score is: ', Score)

顺便提一句。 一些技巧。

如果您稍后执行（通过分配新值），则不需要在顶部初始化变量。

Python 变量通常从小写开始（类从大写开始）。

您可以以更短的方式递增和递减x += 1

如果 arguments 用空格隔开就好了，例如。 random.randint(1, 12)

function 之后的空格（如 Python 3 中的input或print ）是不必要的。

您可以加入新行和字符串，例如。 print('\nWell done, Your final score is:', Score) BTW。 print中的 arguments 默认用空格分隔。

对于 Python 3.6+，您可以使用格式字符串，它更容易（参见f之前' ）：
print(f'\nWell done, Your final score is: {Score}')或
print(f'What is {num3} + {num4}?')