46 lines
772 B
Python
46 lines
772 B
Python
"""
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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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"""构造器"""
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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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