day18-面向对象作业

1. 定义一个狗类和一个人类：

   狗拥有属性：姓名、性别和品种 拥有方法：叫唤

   人类拥有属性：姓名、年龄、狗 拥有方法：遛狗

   class Dog:
       def __init__(self, name, gender, variety):
           self.name = name
           self.gender = gender
           self.variety = variety
       def howl(self):
           print(f'{self.name}在叫唤')
   
   d = Dog('旺财', '公', '柯基')
   d.howl()
   
   class Person:
       def __init__(self, name, age):
           self.name = name
           self.age = age
       def stroll(self, dog):
           print(f'{self.name}遛{dog.name}')
   
   
   p = Person('隔壁老王', '18')
   p.stroll(Dog('旺财', '公', '柯基'))
   

2. 定义一个矩形类，拥有属性：长、宽 拥有方法：求周长、求面积

   class Rectangle:
       def __init__(self, length, width):
           self.length = length
           self.width = width
       def Perimeter(self):
           return self.width * 2 + self.length * 2
       def Area(self):
           return self.width * self.length
   r = Rectangle(10, 5)
   print(f'周长：{r.Perimeter()}, 面积：{r.Area()}')
   

3. 定义一个二维点类，拥有属性：x坐标、y坐标 拥有方法：求当前点到另外一个点的距离

   class Two:
       def __init__(self, x, y):
           self.x = x
           self.y = y
       def Get_distance(self, point):
           g = ((self.x - point.x) ** 2 + (self.y - point.y) ** 2) ** 1/2
           return g
   t = Two(2, 3)
   print(f'两点间的距离为{t.Get_distance(Two(3, 7))}')
   

4. 定义一个圆类，拥有属性：半径、圆心 拥有方法：求圆的周长和面积、判断当前圆和另一个圆是否外切

   pi = 3.1415926
   class Circle:
       def __init__(self, r, x, y):
           self.r = r
           self.x = x
           self.y = y
   
       def Perimeter(self):
           return 2 * pi * self.r
   
       def Area(self):
           return pi * self.r ** 2
   
       def Judge(self, point):
           g = ((self.x - point.x) ** 2 + (self.y - point.y) ** 2) ** 1 / 2
           gg = self.r + point.r
           if g == gg:
               return 'yes'
           else:
               return 'no'
   t = Circle(3, 2, 3)
   print(f'是否外切：{t.Judge(Circle(4, 3, 7))}')
   

5. 定义一个线段类，拥有属性：起点和终点， 拥有方法：获取线段的长度

   class Segment:
       def __init__(self, begin, end):
           self.begin = begin
           self.end = end
       def Get_length(self):
           return self.end - self.begin
   s = Segment(5, 10)
   s.Get_length()
   print(f'该线段长度为{s.Get_length()}')
   

标签：__,return,name,self,作业,面向对象,length,day18,def
来源： https://blog.csdn.net/xuzifengniubi/article/details/122093162