double *ellipse_grid ( int n, double r[2], double c[2], int ng );
int ellipse_grid_count ( int n, double r[2], double c[2] );
int i4_ceiling ( double x );
void r82vec_print_part ( int n, double a[], int max_print, char *title );
void r8mat_write ( char *output_filename, int m, int n, double table[] );
void timestamp ( void );