{Sector.PAS}
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 {Sample code for the Sector procedure.}

  uses Graph;

  const R = 50;
 var
   Driver, Mode: Integer;
   Xasp, Yasp: Word;
 begin
   Driver := Detect;{ Put in graphics mode }
   InitGraph(Driver, Mode, '');
   if GraphResult < 0 then
     Halt(1);
   Sector(GetMaxX div 2, GetMaxY div 2, 0, 45, R, R);
   GetAspectRatio(Xasp, Yasp);{ Draw circular sector }
   Sector(GetMaxX div 2, GetMaxY div 2,{ Center point }
     180, 135,{ Mirror angle above }
     R, R * Longint(Xasp) div Yasp);{ Circular }
   Readln;
   CloseGraph;
 end.