猜数字是对还是错? Python [英] Guessing a number, true or false? Python

问题描述

我想给某物分配一个值，然后尝试让某人猜测该值.我已经尝试了一些类似的方法，但是似乎无法使其工作……:

I want to assign something a value and then try and get someone to guess that value. I have tried something along the lines of this but I can't seem to get it to work...:

   foo = 1
   guessfoo = input('Guess my number: ')
   if foo == guessfoo:
       print('Well done, You guessed it!')
   if foo != guessfoo:
       print('haha, fail.')

为什么这行不通?我应该怎么做呢?我是初学者，请帮忙！

Why doesn't this work? And how should I be doing it? I am a beginner at this, please help!

推荐答案

使用python 版本3 :

input()返回一个"str"(字符串)对象.字符串与整数比较将返回False:

input() returns a 'str' (string) object. A string compares to an integer returns False :

1 == '1'
False

您必须像这样投射您的输入:

You must cast your input like that :

guessfoo = int(input('Guess my number: '))

别忘了尝试...除非输入结果无法转换为整数.

Don't forget to try...except if the result of the input cannot be casted into an int.

完整的示例代码:

try:
    foo = 1
    guessfoo = int(input('Guess my number: '))
    if foo == guessfoo:
        print('Well done, You guessed it!')
    else:
        print('haha, fail.')
except ValueError:
    # cannot cast your input
    pass

---

---

使用python 版本2 :

感谢您的评论:

在以前的版本中，输入将评估字符串，因此，如果用户键入1，则输入将返回一个整数.

In previous versions, input would eval the string, so if the user typed in 1, input returned an int.

输入或您的原始代码:

$ python2 test.py 
Guess my number: 1
Well done, You guessed it!

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