/* diff/gsl_diff.h *  * Copyright (C) 2000 David Morrison *  * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. *  * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * General Public License for more details. *  * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */#ifndef __GSL_DIFF_H__#define __GSL_DIFF_H__#include <gsl/gsl_math.h>#undef __BEGIN_DECLS#undef __END_DECLS#ifdef __cplusplus# define __BEGIN_DECLS extern "C" {# define __END_DECLS }#else# define __BEGIN_DECLS /* empty */# define __END_DECLS /* empty */#endif__BEGIN_DECLSint gsl_diff_central (const gsl_function *f,		      double x,		      double *result, double *abserr);int gsl_diff_backward (const gsl_function *f,		       double x,		       double *result, double *abserr);int gsl_diff_forward (const gsl_function *f,		      double x,		      double *result, double *abserr);__END_DECLS#endif /* __GSL_DIFF_H__ */