Sindbad~EG File Manager

int draw(graph *g);      /* draw one graph (with one function) */
int draw_all(graph *g);  /* draw one graph for all saved parameter values */
int user(void);
void poly_line(double *, double *, int);
int graphrelation(term,term,double *,double *,unsigned, unsigned, int);
void contourplot(term, double *, double *, double, unsigned);
void complex_contourplot(term, double *, double *, double, unsigned);
int carefulgraph(int, graph*, int);
void graph_inequality(int, graph*);
void graph_inequality2(graph*, graph*);
int graphparametric(term, term, double *,
                     double,double,double,double,double,double,int, graph*);
void respond(int,int, graph *,int *, int *);
void crosshairs(graph *);  /* write crosshairs in world coordinates in xor mode */
int set_param(char ascii,double value);
int print_graph(void);
void text_size(char *, double *, double *);
int title(graph *);
void erase_old_title(graph *);
int compute_singularities(graph *);  /* in sing.c */
int compute_jumps(graph *);
void create_graph(int, graph *);  /* make default graph structure, in graph.c */
int ode(double *,int,double,double,term, term *, term *, double, double,double,double);
void direction_field(graph *, int);
void draw_grid(graph *, int);
void graphmain(void);
void graphloop(void);
void init_fields(void);   /* in grinfo.c */
void singularities_error(int err);  /* graph.c */
void create_spot(graph *);
void draw_riemann(graph *g);
void draw_simpson(graph *g);
void draw_trapezoid(graph *g);
void preparetograph(graph *g);
void redraw_axes(graph *g);
int graph_ineq(term);