更新交替玩家之间的分数

Question

这是我在2个玩家之间进行游戏的代码，其中2个骰子已经滚动，第一个玩家获得50或者超过50。但不是这样，输出是分数的无限打印而不实际更新。我知道错误可能是我将Apos和Bpos设置为1的地方，但我不知道其他任何解决方法。

from itertools import cycle
import random

def turn_control():
    for current_player in cycle(["A", "B"]):
        play_game(current_player)


def play_game(current_player):
    Apos = 1
    Bpos = 1

    if current_player == "A":

        number1 = random.randint(1,6)
        number2 = random.randint(1,6)
        add = number1 + number2
        Apos = Apos + add
        print("Player A position: ", Apos)

    if Apos >= 50:
        print(current_player, " wins")



    elif current_player == "B":
        number1 = random.randint(1,6)
        number2 = random.randint(1,6)
        add = number1 + number2
        Bpos = Bpos + add
        print("Player B position: ", Bpos)

    if Bpos >= 50:
        print(current_player, " wins")


turn_control()

Answer 1

Apos和Bpos是函数play_game的局部变量，因此在每次调用play_game后都会被丢弃并重置。

你需要使它们成为全局变量（用global关键字作为声明前缀并在函数外单独初始化它们），或者在turn_control中创建某种状态对象然后传递给每个变量调用play_game以便更新。

对于像这样的玩具示例，global路线可能更容易，但状态对象对于专业编程更具可持续性/可测试性/可重用性。

global示例

foo = 1

def increment_and_print():
    global foo
    foo += 1
    print(foo)

increment_and_print()  # prints '2'
increment_and_print()  # prints '3'

状态对象示例

def repeatedly_increment_and_print():
    foo_state = {'foo': 1}
    increment_and_print(foo_state)
    increment_and_print(foo_state)

def increment_and_print(foo_state):
    foo_state['foo'] += 1
    print(foo_state['foo'])

repeatedly_increment_and_print()  # prints '2', then '3'

Answer 2

您需要进行此更改

from itertools import cycle
import random

Apos = 1
Bpos = 1

def turn_control():
    for current_player in cycle(["A", "B"]):
        play_game(current_player)


def play_game(current_player):
    global Apos
    global Bpos

    if current_player == "A":
        number1 = random.randint(1,6)
        number2 = random.randint(1,6)
        add = number1 + number2
        Apos = Apos + add
        print("Player A position: ", Apos)

    if Apos >= 50:
        print(current_player, " wins") 
        quit()

    elif current_player == "B":
        number1 = random.randint(1,6)
        number2 = random.randint(1,6)
        add = number1 + number2
        Bpos = Bpos + add
        print("Player B position: ", Bpos)

    if Bpos >= 50:
        print(current_player, " wins")
        quit()

turn_control()