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type
TFigure = class
procedure Draw; virtual;
end;
TRectangle = class(TFigure)
procedure Draw; override;
end;
TEllipse = class(TFigure)
procedure Draw; override;
end;
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var
Figure: TFigure;
begin
Figure := TRectangle.Create;
Figure.Draw; //µ÷ÓõÄÊÇTRectangle.Draw
Figure.Destroy;
Figure := TEllipse.Create;
Figure.Draw; //µ÷ÓõÄÊÇTEllipse.Draw
Figure.Destroy;
end;
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