Question

下面的代码是一个简单的骰子投掷程序。定义x是否重要？当我定义x =＆＃39; a＆＃39;该程序没有按预期工作。当用户输入＆＃39; n＆＃39; while循环不会退出。以下是代码：

    from random import randint  
    while x != 'N' or x != 'n':  
       rand = randint(1, 6)  
       print "Your new dice number is: " + str(rand)   
       x = raw_input("Do you want to roll again?(y/n): ")

Answer 1

你应该这样做：

from random import randint
x = "y"
while True:
   rand = randint(1, 6)
   print "Your new dice number is: " + str(rand)
   x = raw_input("Do you want to roll again?(y/n): ")
   if(x == "Y" or x == "y"):
       continue
   elif( x == "n" or x == "N"):
       break
   else:
       print "Unknown Input"
       break

并且循环没有中断，因为如果用户输入“N”或“n”，则在代码中没有放置break语句

Answer 2

from random import randint

你必须在while循环之前为变量X赋值：

x='s'

你的程序的第二个问题是while循环中的逻辑（尝试思考为什么它在你的情况下不能正常工作）

while not (x == 'N' or x == 'n'):
    rand = randint(1, 6)
    print "Your new dice number is: " + str(rand)
    x = raw_input("Do you want to roll again?(y/n): ")

错误：未定义变量

2 个答案: