/* RUNGEKUTTA.H : PROTOTYPES AND GLOBAL VARIABLES DEFINITION FOR RUNGEKUTTA.C */

void initialvalues(int, double, ...);
double checkinterval(double, double);
double yi(int);
void chgyi(int, double);
void initialize(void);
void freevalues(void);
double rungekutta(double, ...);

/* GLOBAL VARIABLES */
struct lnode
  {
    double y;
    struct lnode *next;
  };
struct lnode *vectsols, *ys, *kj, *phij;
double xi;
int n;