Question

我正在制作自动售货机而且我有点卡住了。

在我的机器中我有6个选择，但是当我运行程序时，一切都有效，除非我来vending=input("Select a Option: ")所以说我输入“1”它会问我同样的问题，而不是去{ {1}}

Answer 1

每一步都会重复，因为你没有为1到6之间的数字做任何事情，

while error2==True:
    try:
        vending=input("Select a Option: ")
        if vending >= 7:
            print"Enter a number between 1-6. Please try again."
        elif vending==0:
            print"Enter a number between 1-6. Please try again."
            error2=False
        else:
            #do something
            # Set error2 to False to break out of the while loop.
    except NameError:
        print"Enter a number between 1-6. Please try again."
        time.sleep(1)
    except SyntaxError:
        print"Enter a number between 1-6. Please try again."
        time.sleep(1)

Answer 2

输入数字1-6后，您永远不会将error2设置为false。输入0

后，它才会设置为false

附录：我不想仅仅使用变量来跟踪while循环。或者你可以做

while True: 
    if vending = what_you_want:
        do_something()
    #then  to quit looping: 
    elif vending == 0:
        break

输入不断重复

2 个答案: