public Vector3D(Vector3D a)
{
this.x = a.x; this.y = a.y; this.z = a.z;
}
public double Magnitude(Vector3D a)
{
double x, y, z;
x = a.x; y = a.y; z = a.z;
return Math.Sqrt(x * x + y * y + z * z);
}
static void Main(string[] args)
{
Vector3D a = new Vector3D(1, 3, 8);
Vector3D b = new Vector3D();
Console.WriteLine("1"+"2"+"3");
}
