Loc::Loc()This constructor creates a location with position (0.0, 0.0).
Loc::Loc(double x, double y)This constructor creates a location with the given x and y coordinates.
double Loc::XCoord()This routine returns the x coordinate of the invoked upon Loc.
double Loc::YCoord()This routine returns the y coordinate of the invoked upon Loc.
int Loc::operator == (Loc &loc)This overloaded ``equals'' operator returns 1 if the two locations have the same x and y coordinates (within a very small error factor) and 0 otherwise.