day15-面向对象作业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:
    """
    矩形类
    """

    def __init__(self,l=0, w=0):
        self.l = l
        self.w = w

    def perimeter(self):
        return (self.l + self.w) * 2

    def area(self):
        return self.l * self.w

l1 = Rectangle(5,10)
print('矩形周长是：', l1.perimeter())
print('矩形面积是：', l1.area())

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 Dot:
    '''
    点类
    '''
    def __init__(self,x=0,y=0):
        self.x = x
        self.y = y

    def distance(self,x1=0,y1=0):
        return ((self.x - x1)**2 + (self.y-y1)**2) ** 0.5

p1 = Dot()
p1.x = 3
p1.y = 5
print('两点之间距离是：',p1.distance(1,1))

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

class Circle:
    '''
    圆类
    '''
    pi = 3.1415926
    def __init__(self,r=0,x=0,y=0):
        self.r = r
        self.x = x
        self.y = y

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

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

    def distance(self,new_circle):
        l = ((c1.x - c2.x) ** 2 + (c1.y-c2.y) ** 2) ** 0.5
        d = c1.r + c2.r
        if l == d:
            return True
        else:
            return False

c1 = Circle()
c1.r = 5
c1.x = 0
c1.y = 0

c2 = Circle()
c2.r = 10
c2.x = 5
c2.y = 9

print('圆1周长是',c1.perimeter())
print('圆1面积是',c1.area())
print(c1.distance(c2))

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:
    """
    线段
    """
    def __init__(self,x=0,y=0,x1=0,y1=0):
        self.x = x
        self.y = y
        self.x1 = x1
        self.y1 = y1

    def distance(self):
        return ((self.x - self.x1)**2 + (self.y-self.y1)**2) ** 0.5

d = Segment()
d.x = 0
d.y = 0
d.x1 = 5
d.y1 = 5
print('两点之间距离是：',d.distance())

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day15-面向对象作业2

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