我已经设置了一个 RNG 和一个继续按钮，但它不会在继续后更新结果答案

【问题标题】：I've set up a RNG and a continue button but it wont update the result after continuing我已经设置了一个 RNG 和一个继续按钮，但它不会在继续后更新结果
【发布时间】：2018-09-27 04:36:39
【问题描述】：

#Setting up RNG
loop = "y"
while loop == "y" or loop == "yes":
    from random import randint
    dice = (randint(1,10))
    dice2 = (randint(1,10))
    roll = (dice + dice2)
    win = 3
    loss = 2
    cash = 20
    if roll == 3 or roll == 7 or roll == 11 or roll == 17:
        cash += (win)
    else:
        cash -= (loss)
    #Starting game
    print("""Welcome to, Gambling for School!

    You have $20 and must earn as much money as possible

    If you roll a 3, 7, 11, or 17, you will win $3 but any other number 
takes $2

    You have a 20% of winning
""")
    x = input("Press ENTER to start.")
    #Results
    if roll == 11 or roll == 8 or roll == 18:
        print("You rolled an " + str(roll) + "!")
    else:
        print("You rolled a " + str(roll) + "!")
    print("")
    print("Cash - $" + str(cash))
    loop = input("Continue? (Y/N) ").lower()

必须更改缩进以将其显示为代码

当它运行时，我按 Enter 开始游戏，它正确地加减，但是当我选择继续时，它就像我从未输过或赢过任何钱一样。如果我的大脑死了，现在是凌晨 1 点，但我想不出任何办法来修复它

【问题讨论】：

标签： python python-3.x random

【解决方案1】：

在每场比赛之前，您都用20 重新初始化变量cash。要修复游戏，只需将该代码移出循环即可。

win 和 loss 的初始化也可以移出循环，因为它们不会改变。

from random import randint 语句同理，considered a good practice 将所有导入语句放在文件顶部。

from random import randint

#Setting up RNG
loop = "y"
win = 3
loss = 2
cash = 20
while loop == "y" or loop == "yes":
    dice = (randint(1,10))
    dice2 = (randint(1,10))
    roll = (dice + dice2)

    if roll == 3 or roll == 7 or roll == 11 or roll == 17:
        cash += win
    else:
        cash -= loss
    #Starting game
    print("""Welcome to, Gambling for School!

You have $20 and must earn as much money as possible

If you roll a 3, 7, 11, or 17, you will win $3 but any other number 
takes $2

You have a 20% of winning
""")
    x = input("Press ENTER to start.")
    #Results
    if roll == 11 or roll == 8 or roll == 18:
        print("You rolled an " + str(roll) + "!")
    else:
        print("You rolled a " + str(roll) + "!")
    print("")
    print("Cash - $" + str(cash))
    loop = input("Continue? (Y/N) ").lower()

【讨论】：

【解决方案2】：

我会重新排序您的代码以使控制流更加清晰。

为了比较 "if a in several elemets" 你应该使用 set()s - 如果有东西在里面查找时它们非常有效（并且对于其他集合操作）。

对于打印查找str.format() 或python 3.6+ string interpolation: PEP-498

您只能使用 2 个随机数的总和，您可以使用 random.choices(iterable, k=2) 一次性获得它们

from random import choices

cash = 20
winAmount = 3
lossAmount = 2

#Starting game
print("""Welcome to, Gambling for School!

    You have $20 and must earn as much money as possible

    If you roll a 3, 7, 11, or 17, you will win $3, else you loose $2

    You have a 20% chance of winning
""")
x = input("Press ENTER to start.")

lucky_numbers = {3,7,11,17}

# needed for outputting text
pluralize = {8,11,18}
win = False


loop = "y"
while loop and loop[0]== "y":
    sum_dice = sum(choices(range(1,11), k=2))

    if sum_dice in lucky_numbers:
        win = True
        cash += winAmount
    else:
        win = False
        cash -= lossAmount

    print("You {}. You rolled a{} {}!".format(
        "won" if win else "lost",
        "n" if sum_dice in pluralize else "", 
        sum_dice))

    print("")
    print("Cash - $" + str(cash))
    loop = input("Continue? (Y/N) ").lower().strip()

输出：

Welcome to, Gambling for School!

    You have $20 and must earn as much money as possible

    If you roll a 3, 7, 11, or 17, you will win $3, else you loose $2

    You have a 20% of winning

Press ENTER to start.
You lost. You rolled a 6!

Cash - $18
Continue? (Y/N) y
You lost. You rolled a 16!

Cash - $16
Continue? (Y/N) y
You lost. You rolled a 16!

Cash - $14
Continue? (Y/N) y
You lost. You rolled a 15!

Cash - $12
Continue? (Y/N) y
You won. You rolled a 7!

Cash - $15
Continue? (Y/N) n

除了打印格式化输出使用三元（do x if this else y）操作符。更多内容：Does Python have a ternary conditional operator?

【讨论】：