#define	MaxVars		256

extern void RKOneStep(double *, double, int, double *,
		      void (double, int, double *, double *));

extern void RKfprint(FILE *, double, int, double *);

extern void RK(FILE *, double *, double, int, int, double *,
	       void (double, int, double *, double *));

extern void RKFOneStep(double *, double, int, double *q,
		       void (double, int, double *, double *));

extern void RKFfprint(FILE *, double, int, double *q);

extern void RKF(FILE *, double *, double, int, int, double *q,
		void (double, int, double *, double *));

extern void RKFadaptiveOneStep(double *, double *, int, double *q,
			       void (double, int, double *, double *));

extern void RKFadaptivefprint(FILE *, double, double, int n, double *q);

extern void RKFadaptive(FILE *, double *, double *, double, int, int, double *,
			void (double, int, double *, double *));