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- 2013-04-27
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Description: Design interface method, the interface is just a method: double calArea, (), used to calculate the area. (2) the design of the rectangle class Rectangle, and interface Method requirements are as follows: member variable length: int, on behalf of the length of the rectangle member variable width: int, width of the rectangle constructor Rectangle (int l, int w) : the length and width initialize the value given for the parameter implementation of the interface the method calArea (): according to the long length and wide width to calculate the area of a rectangle. (3) Design square Square, inheritance rectangle class Rectangle requirements are as follows: member variable edge: int, on behalf of the side of a square constructor Square (int e): the side length of the edge initialization parameters given value override the parent the class methods calArea (): calculate the area of a square member method int calPerimeter (): calculated based on the long side e
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