#include "Dimension.hh" std::ostream& operator<< (std::ostream &s, const Coordinate &c) { s << "(" << c.x << ", " << c.y << ")"; return s; } std::ostream& operator<< (std::ostream &s, const PositionDelta &c) { s << "(" << c.dx << ", " << c.dy << ")"; return s; }