#ifndef POINT_H
#define POINT_H

typedef struct Point_st {
  float x;
  float y;
} Point;

Point ORIGIN;

struct Vector_st;  // we need this forward declaration because we can't 
                   // #include vector.h without creating a cycle in the .h
                   // files

Point Point_add(Point p, struct Vector_st v);

#endif // POINT_H