2024.5.24

8-5 【Python0018】设计并实现平面点类Point

分数 10

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作者 doublebest

单位 石家庄铁道大学

【题目描述】定义一个平面点类Point，对其重载运算符关系运算符，关系运算以距离坐标原点的远近作为基准，远的为大。

程序完成对其的测试。
【练习要求】请给出源代码程序和运行测试结果，源代码程序要求添加必要的注释。

import math

# 定义平面点类

class Point:

def __init__(self, x, y):

self.x = x

self.y = y

# 计算点到原点的距离

def distance_to_origin(self):

return math.sqrt(self.x ** 2 + self.y ** 2)

# 重载大于运算符

def __gt__(self, other):

return self.distance_to_origin() > other.distance_to_origin()

# 重载小于运算符

def __lt__(self, other):

return self.distance_to_origin() < other.distance_to_origin()

# 重载大于等于运算符

def __ge__(self, other):

return self.distance_to_origin() >= other.distance_to_origin()

# 重载小于等于运算符

def __le__(self, other):

return self.distance_to_origin() <= other.distance_to_origin()

# 重载等于运算符

def __eq__(self, other):

return self.distance_to_origin() == other.distance_to_origin()

# 重载不等于运算符

def __ne__(self, other):

return self.distance_to_origin() != other.distance_to_origin()

# 测试

if __name__ == "__main__":

# 创建点对象

point1 = Point(3, 4) # 离原点距离为5

point2 = Point(-1, -1) # 离原点距离为sqrt(2)

# 测试运算符重载

print("point1 > point2:", point1 > point2) # 输出 True

print("point1 < point2:", point1 < point2) # 输出 False

print("point1 >= point2:", point1 >= point2) # 输出 True

print("point1 <= point2:", point1 <= point2) # 输出 False

print("point1 == point2:", point1 == point2) # 输出 False

print("point1 != point2:", point1 != point2) # 输出 True