public Point2d (Point2d P) // copy constructor
{
X = P.X;
Y = P.Y;
}
public Point2d(Point2d P) // copy constructor
{
X = P.X;
Y = P.Y;
}
public static double dot(Point2d P1, Point2d P2) // inner product 2
{
return (P1.X * P2.X + P1.Y * P2.Y);
}
public static double dot(Point2d P1, Point2d P2) // inner product 2
{
return(P1.X * P2.X + P1.Y * P2.Y);
}