Question

我想制作一个程序，要求用户考虑0和100之间的数字并尝试猜测。

所以这是我目前的代码：

k = raw_input('Think about a number between 0 and 100. (Enter/Return?): ')
x = 'a'
i = 100

if k == 'Enter':
    i = i/2
    while x != 'correct':
        print 'the number is:', i
        x = raw_input('is this the number? (bigger,smaller,correct): ')
        if x == 'smaller':
            i = i/2
        elif x == 'bigger':
            i = i + i/2
        elif x == 'correct':
            print 'Yupiiii!!'
        else:
            print 'Invalid answer'

我对该计划的主要问题是我无法限制其猜测＆＃34;范围。

例如：如果它显示50并且我说它更大会猜测75，那么如果我说更小则会猜测37。 37不是50和75之间的数字;如何在这段时间内猜出一个数字？

如果我继续说'bigger'，它也会超过100。

有什么建议吗？

Answer 1

这是一个简单的实现（使用-1代表更低版本，0代表更高版本，1代表更高版本），专注于如何跟踪有效的输入范围：

def get_int_input(prompt, min_=None, max_=None):
    """Take valid input from the user.

    Notes:
      Valid input is an integer min_ <= input <= max_. By default,
      no limits are applied.

    """
    ...

def guess_my_number(min_=0, max_=100):
    """Guess the number the user is thinking of."""
    print "Think of a number between {} and {}.".format(min_, max_)
    prompt = "Is it {}? "
    while True:
        guess = min_ + ((max_ - min_) // 2) # guess the middle of the range
        result = get_int_input(prompt.format(guess), -1, 1)
        if result > 0:
            min_ = guess # must be bigger than guess
        elif result < 0:
            max_ = guess # must be smaller than guess
        else:
            break # done

在游戏中：

>>> guess_my_number()
Think of a number between 0 and 100.
Is it 50? -1
Is it 25? 1
Is it 37? 1
Is it 43? -1
Is it 40? 1
Is it 41? 1
Is it 42? 0

请注意，制作min_和max_参数可让您轻松提出不同的问题：

>>> guess_my_number(1, 10)
Think of a number between 1 and 10.
Is it 5? 1
Is it 7? 0

Answer 2

您需要跟踪数字可能在的范围的两端，而不仅仅是顶部。

＆＃34;猜猜我的号码＆＃34;游戏与一个循环

2 个答案: