python类的组合

class Dog:
    def __init__(self,name,aggr,hp,kind):
        self.name=name
        self.aggr=aggr
        self.hp=hp
        self.kind=kind

    def bite(self,person):
        person.hp-=self.aggr

class Person:
    def __init__(self,name,aggr,hp,sex):
        self.name=name
        self.aggr=aggr
        self.hp=hp
        self.sex=sex
        self.money=0

    def attack(self,dog):
        dog.hp-=self.aggr

    def get_weapon(self,weapon):
        if self.money >= weapon.price:
            self.money -=weapon.price
            self.weapon=weapon
            self.aggr +=weapon.aggr
        else:
            print(‘余额不足，请先充值！‘)


class Weapon:
    def __init__(self,name,aggr,njd,price):
        self.name=name
        self.aggr=aggr
        self.njd=njd
        self.price=price

    def hand18(self,stroke):  #武器放大招
        if self.njd>0:
            stroke.hp -= self.aggr*2
            self.njd -=1

alex=Person(‘alex‘,0.5,100,‘不详‘)
jin=Dog(‘金老师‘,100,500,‘teddy‘)
w=Weapon(‘打狗棒‘,100,3,998)

alex.money += 1000 #充值1000
#alex获取装备
alex.get_weapon(w)
print(‘alex获取的装备对象：‘,alex.weapon)
print(‘alex获取装备后总的血量：‘,alex.aggr)
print(alex.__dict__)

print(‘---------------------‘)
alex.attack(jin)   #alex打狗，狗的血掉了
print(‘alex打狗后，狗的血量：‘,jin.hp)

print(‘++++++++++++++++++++++‘)
alex.weapon.hand18(jin)  #alex用获取到的装备的大招打攻击狗
print(‘alex用大招攻击狗后，狗的血量：‘,jin.hp)

from math import  pi

class Circle:
    def __init__(self,r):
        self.r=r

    def area(self):  #面积
        return pi*(self.r**2)

    def perimeter(self):  #周长
        return 2*pi*self.r

class Ring:
    def __init__(self,outside_r,inside_r):
        self.outside_c=Circle(outside_r)
        self.inside_c=Circle(inside_r)

    def area(self):
        return self.outside_c.area()-self.inside_c.area()

    def perimeter(self):
        return self.outside_c.perimeter()+self.inside_c.perimeter()

#求一个圆环的面积和周长
ring=Ring(20,10)
print(ring.area())
print(ring.perimeter())

class Birthday():
    def __init__(self,year,month,day):
        self.year=year
        self.month=month
        self.day=day

class Course:
    language = [‘Chinese‘]
    def __init__(self,course_name,period,price):
        self.name = course_name
        self.period = period
        self.price = price

    def func(self):
        pass

class Teacher():
    def __init__(self,name,age,sex,birthday):
        self.name=name
        self.age=age
        self.sex=sex
        self.birthday=birthday
        self.course=Course(‘python‘,‘6 months‘,2000) #实例对象属性是类Course实例对象

b=Birthday(‘2020‘,‘02‘,‘27‘)
t1=Teacher(‘小王‘,28,‘女‘,b)  #实例对象t1的属性birthday是类Birthday实例对象

print(‘老师生日的年份：‘,t1.birthday.year)
print(‘老师生日的月份：‘,t1.birthday.month)
print(‘----------------------‘)
print(‘老师教的课程名称：‘,t1.course.name)
print(‘老师教的课程价格：‘,t1.course.price)