2
double decide_color_range(double, double, double);
5
struct point *segment(int, int, int, double, double, int, int, int, int,
6
SEGMENT *, SEGMENT *, SEGMENT *, int, int, int, int,
9
double find_orientation(int, int, int);
10
double find_inclination(int, int, int, SEGMENT *, int, int, int, double);