Question

我试图模拟（微小的）战争游戏！作为OOP的练习。我有一个循环，彼此玩两个甲板，但它似乎永远循环，一次又一次地重复相同的序列。输出到达一个牌组中有4个牌对象的点，然后循环重复。只有当两个Drawpile对象都大于零时，才应该运行循环。

ranks = [2,3,4,5,6,7,8,9,10,11,12,13,14] #for use of value comparison via index
suits =['Diamonds','Hearts','Clubs','Spades']
rounds = 0

class Card:
    def __init__(self, rank, suit): 
        self.rank = rank
        assert rank in ranks
        assert suit in suits
        self.suit = suit
    def __repr_(self):
        return '{} of {}'.format(self.rank,self.suit)
    def __str__(self):
        return '{} of {}'.format(self.rank,self.suit)
    def __eq__(self, other): 
        if self.rank == other.rank:
            return True
        else:
            return False
    def __gt__(self, other): #gt compared via ordering of ranks index
        if self.rank > other.rank:
            return True
        else:
            return False
    def __lt__(self, other):
        if self.rank < other.rank:
            return True
        else:
            return False

class Drawpile:
    def __init__(self, pile =[]):
        self.pile = pile
    def __len__(self):
        return len(self.pile)
    def __getitem__(self, n):
        return self.pile[n]
    def add(self, n):
        self.pile.append(n)
    def draw(self):
        if len(self) <= 0:
            return None
        return self.pile.pop(0)

dp1 = Drawpile([Card(2,'Diamonds'),Card(13,'Hearts'),Card(7,'Clubs')])
dp2 = Drawpile([Card(4,'Hearts'),Card(3,'Hearts'),Card(8,'Spades')])

while len(dp1) > 0 and len(dp2) > 0:

    rounds += 1
    c1 = dp1.draw()
    c2 = dp2.draw()

    print('Round ',rounds)
    print('c1',c1, len(dp1))
    print('c2',c2, len(dp2))

    if c1 > c2:
        dp1.add(c1)
        dp1.add(c2)
    else:
        dp2.add(c1)
        dp2.add(c2)

if len(dp1) > len(dp2):
    print('Pile 1 Won!')
else:
    print('Pile 2 Won!')

有人能告诉我这个循环到底在哪里被卡住了吗？我已经尝试过将其绘制出来，这是我的第二次重写。有什么想法吗？

Answer 1

这是一个真正的无限循环：这就是游戏的本质。没有保证结束。这是你提供的一段跟踪（好工作！），它显示了循环。列出的第一轮和最后一轮是相同的;在这两种情况下，这些背后的甲板也是相同的。如果你想要一个有限的游戏，你需要对这种情况实施某种解决方案。

Round  64274
c1 13 of Hearts 3
c2 4 of Hearts 1
Round  64275
c1 2 of Diamonds 4
c2 8 of Spades 0
Round  64276
c1 7 of Clubs 3
c2 2 of Diamonds 1
Round  64277
c1 3 of Hearts 4
c2 8 of Spades 0
Round  64278
c1 13 of Hearts 3
c2 3 of Hearts 1
Round  64279
c1 4 of Hearts 4
c2 8 of Spades 0
Round  64280
c1 7 of Clubs 3
c2 4 of Hearts 1
Round  64281
c1 2 of Diamonds 4
c2 8 of Spades 0
Round  64282
c1 13 of Hearts 3
c2 2 of Diamonds 1
Round  64283
c1 3 of Hearts 4
c2 8 of Spades 0
Round  64284
c1 7 of Clubs 3
c2 3 of Hearts 1
Round  64285
c1 4 of Hearts 4
c2 8 of Spades 0
Round  64286
c1 13 of Hearts 3
c2 4 of Hearts 1

战争卡片游戏模拟器中的无限循环

1 个答案: