39 lines
838 B
ObjectPascal
39 lines
838 B
ObjectPascal
// Класс штампа прямоугольника с методами увеличения-уменьшения от центра
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uses GraphABC;
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type
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RectangleStamp = class
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x,y,w,h: integer;
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constructor (xx,yy,ww,hh: integer);
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begin
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x := xx; y := yy;
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w := ww; h := hh;
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end;
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procedure Stamp;
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begin
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Rectangle(x,y,x+w,y+h);
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end;
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procedure IncreaseFromCenter(dw: integer);
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begin
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w += dw*2; h += dw*2;
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x -= dw; y -= dw;
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end;
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procedure DecreaseFromCenter(dw: integer);
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begin
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IncreaseFromCenter(-dw);
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end;
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procedure MoveOn(dx,dy: integer);
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begin
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x += dx; y += dy;
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end;
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end;
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begin
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var r := new RectangleStamp(100,100,300,300);
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r.Stamp;
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while r.w>2 do
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begin
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r.DecreaseFromCenter(4);
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r.Stamp;
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end;
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end. |