static int Main()
{
System.Console.Write("Example with vector v:\n");
vector3d v = new vector3d(1.2, 1.5, 2.0);
System.Console.Write("v = " + v + "\n");
System.Console.Write("v_x = " + v.x + "\n");
System.Console.Write("Changing v_x to 10 and v_y to 3.\n");
v.x = 10;
v.y = 3;
System.Console.Write("v_x = " + v.x + "\n");
v.print("v=");
System.Console.Write("Defining new vector u:");
vector3d u = new vector3d(2, 5, 7);
double a = 2;
u.print("u=");
System.Console.Write("Calculating 2*u, u+v and cross-product of u and v \n");
vector3d w = u * a;
w.print("2*u = ");
vector3d q = u + v;
q.print("u+v = ");
vector3d t = v.vectorProduct(u);
t.print("u x v = ");
System.Console.Write("Magnitude v = {0:f3}\n", v.magnitude());
return(0);
}