更新

Python-100-Days/Day01-15/Day08/rect.py

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+"""
+
+定义和使用矩形类
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-08
+
+"""
+
+
+class Rect(object):
+	"""矩形类"""
+
+	def __init__(self, width=0, height=0):
+		"""构造器"""
+		self.__width = width
+		self.__height = height
+
+	def perimeter(self):
+		"""计算周长"""
+		return (self.__width + self.__height) * 2
+
+	def area(self):
+		"""计算面积"""
+		return self.__width * self.__height
+
+	def __str__(self):
+		"""矩形对象的字符串表达式"""
+		return '矩形[%f,%f]' % (self.__width, self.__height)
+
+	def __del__(self):
+		"""析构器"""
+		print('销毁矩形对象')
+
+
+if __name__ == '__main__':
+	rect1 = Rect()
+	print(rect1)
+	print(rect1.perimeter())
+	print(rect1.area())
+	rect2 = Rect(3.5, 4.5)
+	print(rect2)
+	print(rect2.perimeter())
+	print(rect2.area())