kind of abstract designs a class hierarchy, the definition of an abstract category-- shape, These include the shape of the area for an abstract method.---- Succession of the abstract category definition triangular, rectangular, round.---- Prepare a main program will be a triangle, rectangle, circle into an array, various array of graphics output of the area.

Packet : 67506281hm6.rar filelist
抽象类的使用.txt

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