//Basic Constructor
//Exercise
Create a Vector class.
It will have 3 attributes-> floats:  x, y and z
Add a constructor -> sets x=y=z=0;
Add a setX, setY and setZ methods.
Also add getX, getY and getZ methods.

Create a scale method.
It will, given a parameter, s and
it will change x,y and z to be s*x; s*y and s*z   (that is x=s*x; etc)
Useage:
   Vector vA;
   vA.scale(3);
If x=1, y=2 and z=3  That's vA=(1,2,3) then After calling scale(3)
vA=(3,6,9)