Python小案例：回合制奧特曼打怪獸遊戲

from abc import ABCMeta, abstractmethod
from random import randint, randrange
import time


class Fighter(object, metaclass=ABCMeta):
    """戰鬥者"""
    # 通過__slots__魔法限定對象可以綁定的成員變量
    __slots__ = ('_name', '_hp')

    def __init__(self, name, hp):
        """
        構造器
        :param name: 名字
        :param hp: 生命值
        """
        self._name = name
        self._hp = hp

    @property
    def name(self):
        return self._name

    @property
    def hp(self):
        return self._hp

    @hp.setter
    def hp(self, hp):
        self._hp = hp

    @property
    def alive(self):
        return self._hp > 0

    @abstractmethod
    def attack(self, other):
        """
        攻擊
        :param other:被攻擊的對象
        :return:
        """
        pass


class Ultraman(Fighter):
    """奧特曼"""
    __slots__ = ('_name', '_hp', '_mp')

    def __init__(self, name, hp, mp):
        """
        構造器
        :param name: 名字
        :param hp: 生命值
        :param mp: 魔法值
        """
        super().__init__(name, hp)
        self._mp = mp

    def attack(self, other):
        other.hp -= randint(15, 25)

    def huge_attack(self, other):
        """
        究極必殺技（打掉對方至少50滴血或者四分之三）
        :param other: 被攻擊對象
        :return: 使用必殺技成功返回True否則返回False
        """
        if self._mp >= 50:
            self._mp -= 50
            injury = other.hp * 3 // 4
            if injury >= 50:
                injury = injury
            else:
                injury = 50
            other.hp -= injury
            return True
        else:
            self.attack(other)
            return False

    def magic_attack(self, others):
        """
        魔法攻擊
        :param others: 被攻擊的羣體
        :return: 使用魔法成功返回True 不成功False
        """
        if self._mp >= 20:
            self._mp -= 20
            for temp in others:
                if temp.alive:
                    temp.hp -= randint(10, 15)
            return True
        else:
            return False

    def resume(self):
        """恢復魔法值"""
        incr_point = randint(1, 10)
        self._mp += incr_point
        return incr_point

    def __str__(self):
        return '~~~%s奧特曼~~~\n' % self._name + \
               '生命值：%d\n' % self._hp + \
               '魔法值：%d\n' % self._mp


class Monster(Fighter):
    """小怪獸"""
    __slots__ = ('_name', '_hp')

    def attack(self, other):
        other.hp -= randint(10, 20)

    def __str__(self):
        return '~~~%s小怪獸~~~\n' % self._name + \
               '生命值：%d\n' % self._hp


def is_any_alive(monsters):
    """判斷有沒有小怪獸是活着的"""
    for monster in monsters:
        if monster.alive > 0:
            return True
    return False


def select_alive_one(monsters):
    """選中一隻或者的怪獸"""
    monsters_len = len(monsters)
    while True:
        index = randrange(monsters_len)
        monster = monsters[index]
        if monster.alive > 0:
            return monster


def display_info(ultraman, monsters):
    """顯示奧特曼和小怪獸的信息"""
    print(ultraman)
    for monster in monsters:
        print(monster, end=' ')


def main():
    u = Ultraman('她與斷劍', 1000, 120)
    m1 = Monster('哥斯拉', 250)
    m2 = Monster('大白鯊', 500)
    m3 = Monster('蒼井空', 750)
    ms = [m1, m2, m3]
    fight_round = 1
    while u.alive and is_any_alive(ms):
        print('========第%02d回合========' % fight_round)
        m = select_alive_one(ms)  # 選中一隻小怪獸
        skill = randint(1, 10)  # 通過隨機數選擇使用哪種攻擊方法
        if skill < 6:  # 60%概率是普攻
            print('%s使用普通攻擊打了%s的傷害' % (u.name, m.name))
            u.attack(m)
            print('%s的魔法值回覆了%d點' % (u.name, u.resume()))
        elif skill <= 9:  # 30%概率使用了魔法攻擊，魔法值不足還會失敗
            if u.magic_attack(ms):
                print('%s使用了魔法攻擊' % u.name)
            else:
                print('%s使用魔法失敗' % u.name)
        else:  # 10%的概率使用大招 魔法不足放不出來
            if u.huge_attack(m):
                print('%s使用大招虐了%s' % (u.name, m.name))
            else:
                print('%s普攻了%s' % (u.name, m.name))
                u.attack(m)
                print('%s的魔法值回覆了%d點' % (u.name, u.resume()))
        if m.alive > 0:
            print('%s回擊了%s' % (m.name, u.name))
            m.attack(u)

        display_info(u, ms)  # 每個回合結束後顯示奧特曼和小怪獸的信息
        fight_round += 1
        time.sleep(3)
    print('\n========戰鬥結束！========\n')
    if u.alive > 0:
        print('%s奧特曼勝利' % u.name)
    else:
        print('小怪獸勝利')


if __name__ == '__main__':
    main()

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