Question

如果用户的猜测大于或小于随机生成的值，则Python循环不希望循环回来。它要么退出循环，要么创建无限循环。我哪里错了？

import random

correct = random.randint(1, 100)
tries = 1
inputcheck = True
print("Hey there! I am thinking of a numer between 1 and 100!")
while inputcheck:
    guess = input("Try to guess the number! " )
    #here is where we need to make the try statement
    try:
        guess = int(guess)
    except ValueError:
        print("That isn't a number!")
        continue
    if 0 <= guess <= 100:
        inputcheck = False
    else:
        print("Choose a number in the range!")
        continue
    if guess == correct:
        print("You got it!")
        print("It took you {} tries!".format(tries))
        inputcheck = False
    if guess > correct:
        print("You guessed too high!")
        tries = tries + 1
    if guess < correct:
        print("You guessed too low!")
        tries = tries + 1

    if tries >= 7:
        print("Sorry, you only have  7 guesses...")
        keepGoing = False

Answer 1

问题在于这一行：

if 0 <= guess <= 100:
    inputcheck = False

每当用户输入0到100之间的数字时，这将终止循环。您可以将此部分重写为：

if not 0 <= guess <= 100:
    print("Choose a number in the range!")
    continue

Answer 2

正确的代码如下：

import random

correct = random.randint(1, 100)
tries = 1
inputcheck = True
print("Hey there! I am thinking of a numer between 1 and 100!")
while inputcheck:
    guess = input("Try to guess the number! " )
    #here is where we need to make the try statement
    try:
        guess = int(guess)
    except ValueError:
        print("That isn't a number!")
        continue
    if 0 > guess or guess > 100:
        print("Choose a number in the range!")
        continue
    if guess == correct:
        print("You got it!")
        print("It took you {} tries!".format(tries))
        inputcheck = False
    if guess > correct:
        print("You guessed too high!")
        tries = tries + 1
    if guess < correct:
        print("You guessed too low!")
        tries = tries + 1
    if tries > 7:
        print("Sorry, you only have  7 guesses...")
        inputcheck = False

这里的问题是，当inputcheck的值介于0到100之间时，您将guess设置为False。这会将while的值更改为False并且循环次数为退出，因为不再是True。

此外，您应该更改while循环中的最后一个if个案，因为这样可以立即修复无限期运行的情况：

if tries > 7:
    print("Sorry, you only have  7 guesses...")
    inputcheck = False

Python 3.4：while循环不循环

2 个答案: