#include <TColStd_Array1OfReal.hxx>
#include <Standard_Real.hxx>
#include <GccEnt_Position.hxx>
-class Standard_OutOfRange;
-class GccEnt_BadQualifier;
-class StdFail_NotDone;
-class Standard_NegativeValue;
class Geom2dGcc_QualifiedCurve;
class Geom2d_Point;
class GccAna_Circ2d2TanRad;