面向对象案例

类名：Person
属性：gun  bulletBoxList
行为：fire()  downBulletBox() upBulletBox()  reloadBullet()

类名：Gun
属性：bulletBox
行为：shoot()

弹夹
类名：BulletBox
属性：count  bulletList
行为：

子弹
类名：Bullet
属性：kj
行为：

class Bullet(object):
    def __init__(self, kj):
        self.kj = kj

class BulletBox(object):
    def __init__(self, count):
        self.count = count
        self.bulletList = []

class Gun(object):
    def __init__(self):
        self.bulletBox = None

    def shoot(self):
        if len(self.bulletBox.bulletList) == 0:
            print("没有子弹了，请更换弹夹!")
        else:
            self.bulletBox.bulletList.pop()
            print("剩余%d发子弹"%len(self.bulletBox.bulletList))

from bullet import Bullet

class Person(object):
    def __init__(self, gun, bulletBoxList):
        self.gun = gun
        self.bulletBoxList = bulletBoxList

    def fire(self):
        if not self.gun.bulletBox:
            print("请添加弹夹!")
        else:
            self.gun.shoot()

    def downBulletBox(self):
        # 没有子弹的弹夹
        temp = self.gun.bulletBox
        self.gun.bulletBox = None
        return temp

    def upBulletBox(self, bulletBox):
        self.gun.bulletBox = bulletBox

    def reloadBullet(self, bulletBox, count):
        for i in range(count):
            #创建子弹
            bullet = Bullet(7.62)
            bulletBox.bulletList.append(bullet)

from person import Person
from gun import Gun
from bulletBox import BulletBox


def main():
    #创建一把枪
    gun = Gun()

    #创建5个弹夹
    bulletBoxList = []
    for i in range(5):
        bulletBox = BulletBox(7)
        bulletBoxList.append(bulletBox)


    #创建一个人
    per = Person(gun, bulletBoxList)


    #让人给每个弹夹都上满子弹
    for bulletBox in per.bulletBoxList:
        per.reloadBullet(bulletBox, bulletBox.count)

    #找一个弹夹上到枪中
    bulletBox = per.bulletBoxList[0]
    per.upBulletBox(bulletBox)


    per.fire()
    per.fire()
    per.fire()
    per.fire()
    per.fire()
    per.fire()
    per.fire()
    per.fire()

    #没子弹，卸载弹夹
    bulletBox = per.downBulletBox()
    #给这个单击在填满子弹
    per.reloadBullet(bulletBox, bulletBox.count)


    # 找一个弹夹上到枪中
    bulletBox = per.bulletBoxList[2]
    per.upBulletBox(bulletBox)
    print("-------")
    per.fire()



if __name__ == "__main__":
    main()