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GitHub Repository: jackfrued/Python-100-Days
 Path: blob/master/Day01-15/code/Day08/rect.py
Views: 729
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"""

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定义和使用矩形类

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Version: 0.1

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Author: 骆昊

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Date: 2018-03-08

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"""

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class Rect(object):

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    """矩形类"""

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    def __init__(self, width=0, height=0):

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        """初始化方法"""

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        self.__width = width

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        self.__height = height

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    def perimeter(self):

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        """计算周长"""

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        return (self.__width + self.__height) * 2

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    def area(self):

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        """计算面积"""

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        return self.__width * self.__height

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    def __str__(self):

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        """矩形对象的字符串表达式"""

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        return '矩形[%f,%f]' % (self.__width, self.__height)

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    def __del__(self):

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        """析构器"""

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        print('销毁矩形对象')

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if __name__ == '__main__':

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    rect1 = Rect()

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    print(rect1)

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    print(rect1.perimeter())

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    print(rect1.area())

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    rect2 = Rect(3.5, 4.5)

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    print(rect2)

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    print(rect2.perimeter())

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    print(rect2.area())

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