python - 正确地将变量传递给函数

Question

我创建了一个剪刀石头布应用程序，允许用户指定他们想要玩的回合数。在这些指定的回合之后，应用程序将显示分数。在确保应用程序正常运行后，我尝试为应用程序的特定部分创建函数。我试图返回变量以传递给其他函数，但应用程序不起作用。我想我在这里遗漏了一些关键的东西。

我试图弄乱选项卡并更改某些变量，但我没有运气。

当前错误信息:

Traceback (most recent call last):

  File "C:/Users/iamep/Desktop/Python Projects/RockPaperScissors.py", line 96, in <module>
        main()
      File "C:/Users/iamep/Desktop/Python Projects/RockPaperScissors.py", line 90, in main
        runGame(rounds)
    NameError: name 'rounds' is not defined

代码:

#display Welcome Message
def welcomeMsg():
    print ("Welcome to Rock Paper Scissors")

#User Inputs Number of Rounds
def roundChoice():
    user_input = input('Enter Number of Rounds: ')          
    try:
            rounds = int(user_input)
    except ValueError:
            print('Not a number')
    return rounds
def runGame(rounds):

    import random                         #imports a random module for the computer.
    game = ["ROCK", "PAPER", "SCISSORS"]  #sets the game answers.
    count = 0                             #game count is set to zero.
    score = 0                             #player score is set to zero.
    computerscore =0                      #computers score is set to zero.

    while count == 0:                                       #starts game if count is zero.
      for i in range (rounds):                              #repeats the turns to the user specified rounds
        answer = input ("Pick rock, paper or scissors: ")   #users input their choice

        print (answer.upper())                               #prints the users answer
        computer= random.choice(game)                        #computer picks randomly

        print ("Computer picks",computer)                            #Display Computer Option
        if answer.upper() == "ROCK" and computer == "ROCK":          #This whole set of code sets the game that what beats what.
          print ("Its a tie!")                                       # prints after each response that who won.
          count +=1                                                  #the count variable is increased.

        elif answer.upper() == "PAPER" and computer == "PAPER":
          print ("Its a tie!")
          count +=1

        elif answer.upper() == "SCISSORS" and computer == "SCISSORS":
          print ("Its a tie!")
          count +=1

        elif answer.upper() == "PAPER" and computer == "ROCK":
          print ("You win!")
          count +=1
          score +=1                                                 #If User Wins Score is Added

        elif answer.upper() == "PAPER" and computer == "SCISSORS":
          print ("You lose!")
          count +=1
          computerscore +=1                                         #IF Computer Wins computerscore is added
        elif answer.upper() == "ROCK" and computer == "PAPER":
          print ("You lose!")
          count +=1
          computerscore +=1

        elif answer.upper() == "ROCK" and computer == "SCISSORS":
          print ("You win!")
          count +=1
          score +=1

        elif answer.upper() == "SCISSORS" and computer == "ROCK":
          print ("lose!")
          count +=1
          computerscore +=1

        elif answer.upper() == "SCISSORS" and computer == "PAPER":
          print ("You win!")
          count +=1
          score +=1
        return score, computerscore

def gameResults(score, computerscore):
    if score < computerscore:                      #Display round results
      print ("Your score is", score)
      print ("Computers score is",computerscore)
      print ("Computer wins!.")

    if score > computerscore:
      print ("Your score is", score)
      print ("Computers socre is",computerscore)
      print ("You win!.")

    if score == computerscore:
      print ("Your score is", score)
      print ("Computers socre is",computerscore)
      print ("Its a tie!!.")
def main():
    welcomeMsg()
    roundChoice()
    runGame(rounds)
    gameResults(score, computerscore)

Answer 1

你的 main 中没有 rounds 所以它会导致错误。您正在从 roundChoice() 返回 rounds 但未为其分配任何变量。我已经分配了它并通过了 runGame() 以获得预期的行为。您的主要实现需要:

def main():
    welcomeMsg()
    rounds=roundChoice()
    runGame(rounds)
    gameResults(score, computerscore)