A compiler for C++ is already built into Mac (try g++ main.cpp in terminal). If you mean an IDE for C++, use Xcode 5, available in app store.
It’s developed by Apple, has git integration too if that’s useful to you. Also has templates and such available to entice you to work on OS X/iOS projects, which might be a nice way in for you (I’m just starting out too, and I think that could be good).
For command-line projects though, I find it best to write in Xcode, then compile and run from the terminal. It’s easier for file I/O and passing arguments to stdin IMO.
You can utilize something called Xcode IDE to write your programs on C++, I have been using that for a quite a while now, and it’s definitely fun. You can find the app from free on APP store or just by clicking the link below. This is one of the many things I like about MAC.
click here to get XCODE