lines.h

Computes the length of a line using two (x,y) points. Uses pointers

//All this does is set up the structs for points and for lines. it then sets the functions to be called by the other .c files.
struct point
{
	double x;
	double y;
};
struct line
{
	struct point p1;
	struct point p2;
};


double length_line(struct line*);
double distance_between_points(struct point*, struct point*);