循环继续循环，即使在终止消息之后

Question

在终止消息后让user input 停止循环时遇到了一些问题。基本上，一旦在Enter bet 字段中输入0 (zero)，程序必须打印终止消息并结束。但是，它会通过询问下一行输入 "Choose a number between 2 and 12" 来继续循环，什么时候应该跳过它。 我知道break 或exit() 可以解决我的问题，但这些不是可接受的解决方案。在Enter bet 字段中输入0 (zero) 后，我需要它来完成并打印终止消息。不继续该程序。

示例需要输出：

you have $500 in your bank # starting amount
Enter bet (or 0 to quit): 0 
Thanks for playing!

我得到的是什么：

Enter bet (or 0 to quit): 0
Thanks for playing!
Choose a number between 2 and 12: # where the program continues to run 
# when it shouldn't. The user should only see this input field if they enter
# number above 0

这是代码

import random

def rollDice(cnt):
    die1 = random.randint(1,6)
    die2 = random.randint(1,6)
    x = int(die1 + die2)
    print('Roll #', cnt, 'was', x)
    return x

def total_bank(bank):
    bet = 0
    while bet <= 0 or bet > min([500,bank]):
        print(f'You have ${bank} in your bank.')
        get_bet = input('Enter your bet (or 0 to quit): ')
        bet = int(get_bet)
        if get_bet == '0': 
            print('Thanks for playing!')
            return bank, bet
        return bank, bet

def get_guess():
    guess = 0
    while (guess < 2 or guess > 12):
        try:
            guess = int(input('Choose a number between 2 and 12: '))
        except ValueError:
            guess = 0
    return guess

prog_info()
bank = 500
guess = get_guess
rcnt = 1

while rcnt < 4:
    rcnt = 0
    bank,bet = total_bank(bank)
    guess = get_guess()
    if guess == rollDice(rcnt+1):
        bank += bet * 2
    elif guess == rollDice(rcnt+2):
        bank += bet * 1.5
    elif guess == rollDice(rcnt+3):
        bank = bank
else:
    bank = bank - bet
    if bank == 0:
        print(f'You have ${bank} in your bank.')
        print('Thanks for playing!')

创建一个起始值为 500 美元的“银行”（变量）。

• 请玩家下注
• 必须为 0（零）或更大，并且不能超过银行当前的金额。

掷两个骰子

• 如果玩家猜中了第一个掷骰子，则将赌注加倍到“银行”
• 如果玩家猜中了第 2 轮，则将 1.5 倍的下注金额加到“银行”中。
• 如果玩家猜中了第 3 次掷骰，则将投注金额添加到银行。 - 如果玩家猜的结果与任何掷骰结果都不匹配，则从“银行”中减去赌注。

让玩家继续玩，直到他们输入“0”（零）作为赌注，或者当他们的银行达到“0”（零）时。

• 不使用 BREAK 或 EXIT()

Answer 1

0 检查应该调用exit

    if get_bet == '0': 
        print('Thanks for playing!')
        exit()

如果您不想使用exit 或break，则需要使用条件退出主循环

• 更新total_bank

    if get_bet == '0': 
        print('Thanks for playing!')
    return bank, bet
  

• 更新主循环

  bet = 1  # to start loop
  
  while rcnt < 4 and bet: # exit loop if bet=0
     rcnt = 0
     bank,bet = total_bank(bank)
     if not bet: continue  # exit game if bet = 0
     guess = get_guess()
     if guess == rollDice(rcnt+1):
         bank += bet * 2
     elif guess == rollDice(rcnt+2):
        bank += bet * 1.5
     elif guess == rollDice(rcnt+3):
         bank = bank
  else:
     if bet:  # bet = 0 if game end
         bank = bank - bet
         if bank == 0:
             print(f'You have ${bank} in your bank.')
             print('Thanks for playing!')
  

Answer 2

你要返回

while rcnt < 4:
    rcnt = 0
    bank,bet = total_bank(bank)
    guess = get_guess()
    if guess == rollDice(rcnt+1):
        bank += bet * 2
    elif guess == rollDice(rcnt+2):
        bank += bet * 1.5
    elif guess == rollDice(rcnt+3):
        bank = bank

从total_bank(bank):内部的循环中断后

您可以修改主循环以在 bet==0 时中断，方法如下修改

while rcnt < 4:
    rcnt = 0
    bank,bet = total_bank(bank)
    if bet==0 :
       break;
    guess = get_guess()
    if guess == rollDice(rcnt+1):
        bank += bet * 2
    elif guess == rollDice(rcnt+2):
        bank += bet * 1.5
    elif guess == rollDice(rcnt+3):
        bank = bank

编辑 - 不休息。

在执行循环之前检查 bet!=0。 只需将 bet 初始化为除零以外的任何值。

bet=1
while (rcnt < 4) and (bet!=0):
    rcnt = 0
    bank,bet = total_bank(bank)
    guess = get_guess()
    if guess == rollDice(rcnt+1):
        bank += bet * 2
    elif guess == rollDice(rcnt+2):
        bank += bet * 1.5
    elif guess == rollDice(rcnt+3):
        bank = bank

Answer 3

要获得第一行所需的输出，请将打印语句更改为

print('You have ${} in your bank.'.format(bank))