For everyone who says "but, i already know lite-c... etc."

do this:
read this:
https://docs.unrealengine.com/latest/INT/Programming/Introduction/index.html

then read all stuff under gameplay programming on the right pane.

from there on it should be easy to convert whatever you wrote in lite-c to unreal c++.

rest is figuring out a pipeline to converting your assets to unreal engine.