Python 3.5：猜立方根游戏返回 None 作为输出

Question

我已经查找了有关该问题的其他答案，但我很难在我的程序中实施该解决方案（对 Python 来说仍然很新）。这是我目前所拥有的：

# Purpose: 'guess' randomly selects a number between 0 and 100 (including those
# numbers) and calculate the cube of that number. It also prompts the user to 
# guess the cube root of the cubed number, displaying 'Correct!' if correct, and
# asking the user if they would like to try again if incorrect.

def guess():
    import random
    rand = random.randint (0, 100)
    cubed = rand*rand*rand

    # Forming the input question
    string = "What is the cube root of"
    cubed = str(cubed)
    qmark = "?"
    question = print(string, cubed + qmark)

    user = int(input(question))
    while (user == rand):
        print ("\nCorrect!")
        user = input("\n\tWould you like to try again?").lower()


    if (user != rand):
        print ("\tIncorrect!, the cube root of", cubed, "is", rand)

这应该是输出的样子：

guess()

What is the cube root of 64000? 56
            Incorrect, the cube root of 64000 is 40

            Would you like to try again? y

What is the cube root of 216? 6
        Correct!

        Would you like to try again? n

Goodbye

Answer 1

这是一个很好的功能开始尝试！要解决的 2 件事：

1) question 变量中不应包含打印内容。将变量放入 input() 将为您打印。这样会更好：

question = string+" "+cubed+qmark

2) 底部部分不太正确。也许你想要这样的东西？最后一行再次调用整个函数 - 这称为 "recursion".

user = int(input(question))
if (user == rand):
    print ("\nCorrect!")
elif (user != rand):
    print ("\tIncorrect!, the cube root of", cubed, "is", rand)
user = input("\n\tWould you like to try again?").lower()
if user == "y":
    guess()

放在一起，这是最终代码：

# Purpose: 'guess' randomly selects a number between 0 and 100 (including those
# numbers) and calculate the cube of that number. It also prompts the user to 
# guess the cube root of the cubed number, displaying 'Correct!' if correct, and
# asking the user if they would like to try again if incorrect.

def guess():
    import random
    rand = random.randint (0, 100)
    cubed = rand*rand*rand

    # Forming the input question
    string = "What is the cube root of"
    cubed = str(cubed)
    qmark = "?"
    question = string+" "+cubed+qmark #################### Remove print here. Input will do it for you.

    user = int(input(question))
    if (user == rand):
        print ("\nCorrect!")
    elif (user != rand):
        print ("\tIncorrect!, the cube root of", cubed, "is", rand)
    user = input("\n\tWould you like to try again?").lower()
    if user == "y":
        guess()
    else:
        print("Goodbye")

guess()

我自己也是最近才开始编程，帮助别人还是第一次！

编辑：根据评论中的建议，这里有一种不使用递归的方法，将所有内容放入 "While True Loop"，也称为永远循环：

def guess():
    while True:
        import random
        rand = random.randint (0, 100)
        cubed = rand*rand*rand

        # Forming the input question
        string = "What is the cube root of"
        cubed = str(cubed)
        qmark = "?"
        question = string+" "+cubed+qmark #################### Remove print here. Input will do it for you.

        user = int(input(question))
        if (user == rand):
            print ("\nCorrect!")
        elif (user != rand):
            print ("\tIncorrect!, the cube root of", cubed, "is", rand)
        user = input("\n\tWould you like to try again?").lower()
        if user != "y":
            print("Goodbye")
            break

guess()

Answer 2

这可能有帮助：

def guess():
    import random
    rand = random.randint (0, 100)
    cubed = rand*rand*rand

    # Forming the input question
    question = "What is the cube root of {cubed} ?".format(cubed=cubed)

    user = int(input(question))
    if user == rand:
        print ("\nCorrect!")

    else:
        print ("\tIncorrect!, the cube root of", cubed, "is", rand)

choice = 'y'
while choice == 'y':
  guess()
  choice = input("Would you like to play again ?").lower()
else:
  print("Goodbye")

您将 print 函数（即 None）的 return 值存储在 question 中，然后将 question 传递给 input打印它的函数

Python 3.5：猜立方根游戏返回 None 作为输出

Python 3.5: Guessing the cube root game is returning None as an output

python

python-3.5