Question

这是螃蟹模拟器。我的while循环遇到了麻烦。在哪里说

while val == True:

问题出在哪里。它保持在while循环中但没有任何反应。如果您发现任何事情，我将非常感激。这是完整的代码。（我试图验证一切）

import time
import random
control1 = False
control2 = True
x = True
val = True
z = True
def throw(n):
    for i in range(1,n+1):
        dice_1 = random.randint(1,6);dice_2 = random.randint(1,6)
        print "roll",i,", die 1 rolled",dice_1,"and die 2 rolled",dice_2,",total",dice_1+dice_2
        time.sleep(2)
    return n

while z == True:
    if x == True:
        while control1 == False:
            try:
                amount_1 = int(raw_input("Welcome to crabs.\nHow many times would you like to roll:"))
                control1 = True
            except ValueError:
                print ("Enter a valid number.")
            throw(amount_1)
            x = False
    else:
        while val == True:
            roll_again = raw_input("Would you like to roll again: ")
            if roll_again == "1":
                val = False
                while control2 == True:
                    try:
                        amount_2 = int(raw_input("How many times would you like to roll:"))
                        control2 = False
                    except ValueError:
                        print ("Enter a valid number.")
                    throw(amount_2)
                    z = True
            elif roll_again == "2":
                val = False
                exit()
            else:
                val = True

Answer 1

首次浏览该计划后x和val都是False，但z仍为True。结果，外环继续滚动。

Answer 2

把这一行：

print z, x, val

在声明之下。

在您回复“你想再次滚动：”问题“2”后，您会看到x和val都是错误的。这意味着它将遍历if..else语句的每个部分，并且无限循环。

Answer 3

执行else分支（if x）之后，它停留在无限循环中，因为您将值设置为False。然后在下一次迭代中说while val == True，因为这个语句不是False，并且有 no 其他语句需要考虑，所以你在无限循环中运行。

要了解我的意思，只需在此处添加打印声明：

else:
    print val
    while val == True:
        roll_again = raw_input("Would you like to roll again: ")
        if roll_again == "1":

现在，我不知道你的实际节目是否需要所有布尔值，但是如果我要使它工作，我就会开始消除我不需要的布尔值。我认为你的结构过于复杂。

修改：这是一个使程序更简单的建议。

import time import random x = True z = True def throw(n): for i in range(1,n+1): dice_1 = random.randint(1,6);dice_2 = random.randint(1,6) print "roll",i,", die 1 rolled",dice_1,"and die 2 rolled",dice_2,",total",dice_1+dice_2 time.sleep(2) return n def ask(x): if x: print "Welcome to crabs." try: amount = int(raw_input("How many times would you like to roll:")) except ValueError: print ("Enter a valid number.") throw(amount) while z: ask(x) x = False roll_again = raw_input("Would you like to roll again: ") if roll_again == "1": continue else: break

程序停留在while循环但不运行程序？

3 个答案: