python学习之老男孩python全栈第九期_day022作业

1. 写一个求正方形周长和面积的类

 class Square:
     def __init__(self, length):
         self.length = length
     def area(self):
         return '边长为{}的正方形的面积为：{}'.format(self.length, self.length**2)
     def perimeter(self):
         return '边长为{}的正方形的周长为：{}'.format(self.length, self.length * 4)
 z1 = Square(5)
 print(z1.area())
 print(z1.perimeter())

2. 完成人狗大战

 class Dogs:
     def __init__(self,name,HP,aggr,kind):
         self.name = name
         self.HP = HP
         self.aggr = aggr
         self.kind = kind

     # 狗：攻击技能（咬人）
     def bite(self,person):
         # 狗咬人，人掉血
         person.HP -= self.aggr
         if person.HP <= 0:
             print('%s被%s咬死了, 扑街...') % (person.name, self.name)
         else:
             print('%s被%s咬了, 掉了%s滴血, 还剩%s滴血' % (person.name, self.name ,self.aggr,person.HP))

 class Person:
     def __init__(self,name,HP,aggr,sex):
         self.name = name
         self.HP = HP
         self.aggr = aggr
         self.sex = sex

     # 人：攻击技能（打）
     def attack(self,dog):
         dog.HP -= self.aggr
         if dog.HP <= 0:
             print('%s被%s打死了, 扑街...' % (dog.name, self.name))
         else:
             print('%s被%s打了, 掉了%s滴血, 还剩%s滴血' % (dog.name, self.name ,self.aggr,dog.HP))

 jin = Dogs('二狗', 300, 1, '泰迪')
 alex = Person('人', 200, 500, '不详')
 jin.bite(alex)              # Dogs.bite(jin,alex)
 alex.attack(jin)

3. 默写 面向对象的交互里面的内容