学习 Python - 数字游戏答案

【问题标题】：Learning Python - Number game学习 Python - 数字游戏
【发布时间】：2020-10-01 18:22:16
【问题描述】：

我是 Python 新手。我正在尝试编写一个小游戏，要求最终用户从 1 到 1000 中选择一个数字并将其保留在他们的脑海中（该数字未提供给程序）。该程序应该能够在 10 次猜测中找到数字。像往常一样，我走错了路。我的程序大部分时间都在工作，但有时它在 10 次以下的猜测中找不到数字。这是我的代码：

# script to guess a user's number between 1 and 1000 within 10 guesses

# import random so we can use it to generate random numbers
from random import randint

# Variables
lowerBound = 1
upperBound = 1000
numGuesses = 1
myGuess = 500
failed = False

# Welcome Message
print("#####################################################################################################"
      "\n#                                                                                                   #"
      "\n#   Please think of a number between 1 and 1000.  I will attempt to guess the number in 10 tries.   #"
      "\n#                                                                                                   #"
      "\n#####################################################################################################")

while numGuesses <= 10:

    # if the lower and upper bounds match we've found the number
    if lowerBound == upperBound:
        print(f"\nYour number is {str(lowerBound)}.  It took me '{str(numGuesses)} guesses!")
        break

    print(f"\nIs the number {str(myGuess)}?  If correct, type CORRECT.  If low, type LOW.  If high, type HIGH.")
    # uncomment for var output
    # print(f"\nGuesses = {str(numGuesses)}\nLower bound = {str(lowerBound)}\nUpper bound = {str(upperBound)}")
    userFeedback = input("\nResponse: ").upper()

    if userFeedback == 'HIGH':
        print(f"\nGuess #{str(numGuesses)} was too high")
        if numGuesses == 10:
            failed = True
            break
        upperBound = myGuess - 1
        myGuess = randint(lowerBound, upperBound)
    elif userFeedback == 'LOW':
        print(f"\nGuess #{str(numGuesses)} was too low")
        if numGuesses == 10:
            failed = True
            break
        lowerBound = myGuess + 1
        myGuess = randint(lowerBound, upperBound)
    elif userFeedback == 'CORRECT':
        print(f"\nYour number is {str(myGuess)}!  It took me {str(numGuesses)} guesses!")
        break

    numGuesses += 1

if failed:
    print(f"\nMy final guess of {str(myGuess)} was not correct.  I wasn't able to guess your number in 10 tries.")

（现在）似乎很清楚，我削减数字的方式行不通。本来想问是不是500，低了就问是不是250，再低就问是不是125，以此类推。如果更高，请询问是否是 750、875 等。这是正确的方法吗？

我考虑这个问题太久了，我相信我已经熟透了。谢谢！

【问题讨论】：

下次猜测时不要使用随机数。使用(upperBound - lowerBound) / 2。
不要随机使用！！！这一切都取决于机会
你原来的计划是正确的。你为什么用随机数代替？
@PeterM。如果我对此有答案就好了。 :) 我会尝试转换它。有没有人有这种方法的例子？
myGuess = int((upperBound-lowerBound)/2)

标签： python loops random

【解决方案1】：

myGuess = int(math.ceil((myGuess) / 2))

不正确。

如果您已将范围缩小到 6 和 8 之间，并且您猜测的是 7，那么您之前的代码将调用 4，而不是您的搜索范围。

if userFeedback == 'HIGH':
    print(f"\nGuess #{numGuesses} was too high")
    upperBound = myGuess - 1
elif userFeedback == 'LOW':
    print(f"\nGuess #{numGuesses} was too low")
    lowerBound = myGuess + 1
myGuess = int(lowerBound + ((upperBound - lowerBound) / 2))

【讨论】：

【解决方案2】：

我已经更新了我的代码，并且我认为我拥有它。感谢您的提示。

# script to guess a number between 1 and 1000 within 10 guesses

# Variables
lowerBound = 1
upperBound = 1000
numGuesses = 1
myGuess = 500

# Welcome Message
print("#####################################################################################################"
      "\n#                                                                                                   #"
      "\n#   Please think of a number between 1 and 1000.  I will attempt to guess the number in 10 tries.   #"
      "\n#                                                                                                   #"
      "\n#####################################################################################################")

while numGuesses <= 10:

    # uncomment next line for var output
    # print(f"\nGuesses = {numGuesses}\nLower bound = {lowerBound}\nUpper bound = {upperBound}")

    print(f"\nIs the number {myGuess}?  If correct, type CORRECT.  If low, type LOW.  If high, type HIGH.")
    userFeedback = input("\nResponse: ").upper()

    if userFeedback == 'HIGH':
        print(f"\nGuess #{numGuesses} was too high")
        upperBound = myGuess
        myGuess = (lowerBound + myGuess) // 2
    elif userFeedback == 'LOW':
        print(f"\nGuess #{numGuesses} was too low")
        lowerBound = myGuess
        myGuess = (upperBound + myGuess + 1) // 2
    elif userFeedback == 'CORRECT':
        print(f"\nYour number is {myGuess}!  It took me {numGuesses} guesses!")
        break

    numGuesses += 1

【讨论】：