Sindbad~EG File Manager

typedef struct { int *topics;  int ntopics; int menustr_index; } submenu;
#define MAXSUBMENUS 30
typedef struct { submenu items[MAXSUBMENUS]; int nitems;} menu2;
// menu2  to avoid conflict with menu in cmdmenus.h 

menu2 AlgebraMenu(void);
menu2 PrecalculusMenu(void);
menu2 CalculusMenu(void);
menu2 GraphMenu(void);
menu2 OptionsMenu(void);
menu2 CalculusGraphMenu(void);
menu2 AlgebraGraphMenu(void);
menu2 PrecalculusGraphMenu(void);