电脑猜数字游戏代码故障：猜测13时始终卡在14

问题根源 #

你的代码中goSmall方法的边界更新逻辑完全错误：当程序猜测的数字太大时，应该将上限（upperBound）设置为当前猜测值减1，但你错误地写成了加1，导致边界范围无法正确缩小，最终出现猜测值卡住的情况。

比如目标数字是13时的错误流程：

1. 当程序猜14，你点击“Too large”
2. 错误地将upperBound设为14+1=15
3. 下次计算myNumber = (lowerBound + upperBound) // 2，如果此时lowerBound是13，结果就是(13+15)//2=14，循环往复永远猜不到13

修复后的代码 #

只需要修改goSmall方法中的边界更新代码：

import random
from breezypythongui import EasyFrame

class GuessingGame(EasyFrame):
    """Plays a guessing game with the user."""

    def __init__(self):
        """Sets up the window,widgets, and data."""
        EasyFrame.__init__(self, title = "Guessing Game")
        self.lowerBound = 1
        self.upperBound = 100
        self.count = 0
        self.myNumber = (self.lowerBound + self.upperBound) // 2
        guess = "Is the number " + str(self.myNumber) + "?"
        self.myLabel = self.addLabel(text = guess,
                                       row = 0, column = 0,
                                       sticky = "NSEW",
                                       columnspan = 4)
        self.small = self.addButton(text = "Too small", row = 1,
                                    column = 0, command = self.goLarge)
        self.large = self.addButton(text = "Too large", row = 1,
                                        column = 1,
                                        command = self.goSmall)
        self.correct = self.addButton(text = "Correct", row = 1,
                                        column = 2,
                                        command = self.goCorrect)
        self.newButton = self.addButton(text = "New game", row = 1,
                                        column = 3,
                                        command = self.newGame)

    def goLarge(self):
        """Guess was too small, so move guess to the right of the number."""
        self.count += 1
        self.lowerBound = self.myNumber + 1
        self.myNumber = (self.lowerBound + self.upperBound) // 2
        self.myLabel["text"] = "Is the number " + str(self.myNumber) + "?"
        
    def goSmall(self):
        """Guess was too large, so move guess to the left of the number."""
        self.count += 1
        # 修复：将upperBound设为当前猜测值减1，而不是加1
        self.upperBound = self.myNumber - 1
        self.myNumber = (self.lowerBound + self.upperBound) // 2
        self.myLabel["text"] = "Is the number " + str(self.myNumber) + "?"

    def goCorrect(self):
        """Guess was correct, so disable buttons."""
        self.large["state"] = "disabled"
        self.small["state"] = "disabled"
        self.correct["state"] = "disabled"

    def newGame(self):
        """Resets the GUI to its original state."""
        self.large["state"] = "normal"
        self.small["state"] = "normal"
        self.correct["state"] = "normal"
        self.lowerBound = 1
        self.upperBound = 100
        self.count = 0
        self.myNumber = (self.lowerBound + self.upperBound) // 2
        self.myLabel["text"] = "Is the number " + str(self.myNumber) + "?"

def main():
    """Instantiate and pop up the window."""
    GuessingGame().mainloop()

if __name__ == "__main__":
    main()

额外优化建议 #

• 可以在goCorrect方法中添加弹窗或更新标签文本，显示猜测次数，提升用户体验
• 原代码中if __name__ == "__main__"里的while True是多余的，mainloop()本身就是阻塞循环，重复调用会打开多个窗口，已移除

内容的提问来源于stack exchange，提问作者Ian Schaak