Hi,
I'm new to C::B and I'm a little confused...not an unusual state for me

When I first installed C::B I opened up a bunch of .cpp files that I had written as part of a C++ Tutorial (I'm relatively new to C++). I was able to build and run them just fine. But today I added some projects (prior to this I just had the files) and now I am no longer given the option to build/run the programs by themselves. I also haven't been able to figure out how to edit the properties for the files so that I can build each of them.
Part of the issue is that, because these are all part of a tutorial, they all have a main() function, so I don't want to have to created one project per file...sorry, that just seems like overkill to me. I would just like to have a bunch of files and be able to build/run them. Is this possible with C::B? And, if not, why was I able to do it before I started adding projects?
Thanks,
Rob