Answer 1

Power of C++ is its ability to literally do anything you want. In some aspects you have to put more work than in others, but generally you can build everything you wish. + speed, c++ is fast

Answer 2

I'm using SFML for my 2d game engine. For 3d you could go OpenGL or Ogre3d

Answer 3

C++ program is an object oriented programming language , C++ is a high level language that is much easier to use than the other low level languages such as binary coding  , It takes much more space than low level languages but it is much easier to understand and learn .

Answer 4

It's fast, really fast and it gives you control of the metal, because it's low level (memory, cache, processor), but it can do basically everything higher level order languages do. It just takes a bit more time to code in it.