Question

我有一段时间没有编程，所以我想我会继续使用我的codecademy教程来恢复体形。我现在真的很困惑，因为我得到了所有这些语法错误，我很确定我不应该这样做。

这是我的代码：

from random import randint

# Generates a number from 1 through 10 inclusive
random_number = randint(1, 10)

guesses_left = 3
# Start your game!
while guesses_left > 0:
    guess = int(raw_input("Your guess: ")
    if guess == random_number:
        print "You win!"
        break
    guesses_left = guesses_left - 1
else:
    print "You lose."

由于第10行的冒号，我收到语法错误。

我不明白为什么，它是一个if语句，在if语句之后你总是有一个冒号不是吗？

对于像这样的简单事情，我今天得到了一堆语法错误，我不明白为什么。

Answer 1

这是您的代码的直接复制/粘贴吗？你的int（）是未公开的

guess = int(raw_input("Your guess: ")   <--- missing parenthesis

此外，guesses_left的减少位置错误。它应该放在else块之后，因为它应该在每个循环中递减，而不管if/else

的结果如何

此外，else区块上的缩进与您的if不对齐。 python中的缩进是关键。

Answer 2

您的代码略有变化：

from random import randint

# Generates a number from 1 through 10 inclusive
random_number = randint(1, 10)

guesses_left = 3
# Start your game!
while guesses_left > 0:
    guesses_left = guesses_left - 1
    guess = int(raw_input("Your guess: "))
    if guess == random_number:
        print "You win!"
        break
else:
        print "You lose."

Answer 3

此代码可以帮助您完成任务。我得到的主要错误是它有效，但仍然说游戏结束后出现了错误。这是由于我的其他原因：打印'你输了'。成为时间运作的一部分。取而代之的是与while相同的缩进上的else：，这就是他们想要看到的内容

from random import randint

# Generates a number from 1 through 10 inclusive
random_number = randint(1, 10)

guesses_left = 3

while guesses_left > 0:
    guess = int(raw_input("Your guess: "))
    guesses_left -= 1
    if guess == random_number:
        print "You win!"
        break
else:
    print "You lose."

Answer 4

我是这样做的，我为了好玩而添加了一些额外的功能：

from random import randint

# Generates a number from 1 through 10 inclusive
random_number = randint(1, 10)

print random_number # For debugging

guesses_left = 3 # Amount of guesses left
print "Guess my number! You've got 3 tries left!"

tries = [] # Array for user input

while guesses_left > 0:
    guess = int(raw_input("Your guess: ")) # Asks user to enter a number

    if guess in tries: # Checks if user entered the same number before
        print "You've already guessed this number: ", guess
        print "You've got " , int(guesses_left) , " guess(es) left!"

    elif guess > 10 or guess < 1: # Checks if user input is between 1 and 10
        print "Wrong input! Guess a number between 1 and 10!"
        print "You've got " , int(guesses_left) , " guess(es) left!"

    elif guess == random_number: # If user input is the same as the random number you win!
        print "You win!"
        break

    else:
        guesses_left -= 1 # Decreases the amount of guesses left
        print "You've got " , int(guesses_left) , " guess(es) left!"
        tries.append(guess) # Saves user input to "tries"
else:

    print "You lose!"

Codecademy循环8/19

4 个答案: