如何在循环中增加变量的值？

Question

我正在建造这个石头，纸，剪刀的游戏，而且我已经走了很远。 但是，我无法获得最终分数以正确打印。 无论情况如何，我在总回合，总胜利和平局中总是得到0的值。

我一直在尝试在循环中添加这些变量，但是，我似乎无法弄清楚。

import random

# a rock, paper, scissors game

loop = True

while loop is True:
    win = 0
    tie = 0
    lose = 0
    rounds = 0 

    usrchoice = input("Rock, Paper or Scissors? (Quit ends): ") # user makes a choice

    if usrchoice.title() == "Rock":
        pass

    ...

        if computer_choice == "Scissors":
            print("You WIN!")
            win = win + 1
            rounds = rounds + 1


        elif computer_choice == "Rock":
            print("It's a tie!")
            tie = tie + 1
            rounds = rounds + 1


        else:
            print("You LOSE!")
            lose = lose + 1
            rounds = rounds + 1

我希望输出是任何东西，这当然取决于用户，而不仅仅是0。像这样：

>>> You played 0, and won 0 rounds, playing tie in 0 rounds.

Answer 1

您将在每个循环的开始将变量设置为0。 将变量移到循环上方可解决此问题。

例如：

import random

# a rock, paper, scissors game
# foot beats cockroach, cockroach beats nuke and nuke beats foot

win = 0
tie = 0
lose = 0
rounds = 0 

loop = True

while loop is True:
    usrchoice = input("Foot, Nuke or Cockroach? (Quit ends): ") # user makes a choice

Answer 2

只需在循环之前声明它们：

win = 0
loses = 0 
ties = 0
rounds = 0
while True:
    ...

您要做的是每次循环重新开始时，所有变量都再次设置为0。 通过在循环之前声明它们，代码将运行，并且仅在循环中稍后将它们增加1时才更改它们的值。

Answer 3

您应该在while而不是内部初始化变量。