day16-面向对象作业

1. 定义一个矩形类，拥有属性：长、宽 拥有方法：求周长、求面积

class Rectangular:
    def __init__(self, length=10, width=20):
        self.length = length
        self.width = width


    def get_area(self):
        area = self.length * self .width
        return area


    def get_perimeter(self):
        perimeter = (self.length + self.width) * 2
        return perimeter

    
r1 = Rectangular()
print(f'r1的面积：{r1.get_area():.1f}')
print(f'r1的周长：{r1.get_perimeter():.1f}')
r2 = Rectangular(10, 100)
print(f'r2的面积：{r2.get_area():.1f}')
print(f'r2的周长：{r2.get_perimeter():.1f}')

1. 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 Point:
    def __init__(self, x=0, y=0):
        self.x = x
        self.y = y


    def get_distence(self, point):
        distence = math.sqrt((self.x - point.x) ** 2 + (self.y - point.y) ** 2)
        return distence


p1 = Point()
p2 = Point(3, 4)
print(f'点1到点2的距离是：{p1.get_distence(p2):.1f}')

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

PI = 3.1415926535898
class Circle:
    def __init__(self, x=0, y=0, redius=1):
        self.x = x
        self.y = y
        self.redius = redius


    def get_area(self):
        area = PI * self.redius ** 2
        return area


    def get_perimeter(self):
        perimeter = 2 * PI * self.redius
        return perimeter


    def is_circumscribed(self, point):
        center_distence = math.sqrt((self.x - point.x) ** 2 + (self.y - point.y) ** 2)
        if center_distence == self.redius + point.redius:
            return True
        else:
            return False


c1 = Circle()
c2 = Circle(2, 0, 1)
print(f'圆1的面积：{c1.get_area():.1f}')
print(f'圆1的周长：{c1.get_perimeter():.1f}')
print(f'圆2的面积：{c2.get_area():.1f}')
print(f'圆2的周长：{c2.get_perimeter():.1f}')
print(f'圆1和圆2是否相切：{c1.is_circumscribed(c2)}')

1. 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 Line:
    def __init__(self, start: Point, end: Point):
        self.start = start
        self.end = end

    def get_length(self):
        length = self.start.get_distence(self.end)
        return length


p1 = Point(1, 1)
p2 = Point(2, 2)
l1 = Line(p1, p2)
print(f'线段的长度：{l1.get_length():.1f}')

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=None, sex=None, var=None):
        self.name = name
        self.sex = sex
        self.var = var


    def bark(self):
        print(f'{self.name}：汪汪汪！')


class Person:
    def __init__(self,  dog: Dog, name=None, age=None):
        self.name = name
        self.age = age
        self.dog = dog


    def walk_the_dog(self):
        if self.dog:
            print(f'{self.name}遛{self.dog.name}')
        else:
            print(f'{self.name}没有狗')


d1 = Dog('馒头', '公', '比熊')
p1 = Person(d1, '小明', '22')
d1.bark()
p1.walk_the_dog()

本文地址：https://blog.csdn.net/Maple12138/article/details/114000096