python - 我的 while 循环永远不会到达条件语句并不断循环

Question

任务是做一个猜谜游戏，其中参数就是答案。最后，如果用户答对了，它会打印一条祝贺语句并返回尝试的次数，如果他们输入 quit，它会显示答案并尝试 == -1。除此之外，它会一直循环，直到他们得到正确的答案。

def guessNumber(num):
    tries = 1
    while tries > 0:
        guess = input("What is your guess? ")
        if guess == num:
            print ("Correct! It took you" + str(tries)+ "tries. ")
            return tries
        elif guess == "quit":
            tries == -1
            print ("The correct answer was " + str(num) + ".")
            return tries
        else:
            tries += 1

当我运行它时，无论我放入什么，它都会不断询问我的猜测。

Answer 1

由于您调用了变量 num 所以我猜测它是一个整数，因此您正在检查整数和字符串之间的相等性，因此它永远不是 True。比较时尝试将 num 更改为 str(num)，因此:

def guessNumber(num):
    tries = 1
    while tries > 0:
        guess = input("What is your guess? ")
        if guess == str(num):
            print ("Correct! It took you {0} tries. ".format(tries))
            return tries
        elif guess == "quit":
            tries = -1
            print ("The correct answer was {0}.".format(num))
            return tries
        else:
            tries += 1