So what have you got? Games are not my specialty but you are being so vague that you will have a very hard time getting anyone to help. Plus, this seems like it's a school project, for sure you're not going to get someone from this awesome forum to do your homework for you.
Haha, you are right Stuugie, but i will suggest him a basic GLBasic Project if you really want to know game programming and its logic, then GlBasic will assist you to know all the basic concepts!
i have to make a game for window pc .simplest 2D game
Yes, but why? Is this for a homework assignment, or simply for your own interest in the subject? What are the requirements? What kind of game - a Pac-Man style maze game, a Tetris clone, a side-scroller, an Invader game, a Breakout style wall-smasher, or something else entirely? What kind of deadline do you have? Are there requirements for the tools you can use (a specific platform - you said Windows PC, but that could mean a lot of things, including an MS-DOS program running in DosBox - a specific library, a specific compiler)? Are you writing it in Standard C++ with a suitable graphics library, or a dialect such as C++/CLR whic has a default library included? There are still a lot of details missing for us.