ref: d62e98b84b495c50679803420cf2ba353e72a9d2
parent: 212d529411450ae86d63d5e79fb7a3f72da81e34
author: LTCHIPS <ltchips994@gmail.com>
date: Mon Apr 23 21:23:28 EDT 2018
renamed floor to floorptr and ceiling to ceilingptr because of previously declared instance of floor founded in mathcalls.h