void num_to_string (double v, char *s, int w, int d);
struct fmt_spec make_input_format (int type, int w, int d);
struct fmt_spec make_output_format (int type, int w, int d);
void num_to_string (double v, char *s, int w, int d);
struct fmt_spec make_input_format (int type, int w, int d);
struct fmt_spec make_output_format (int type, int w, int d);