Update main.cpp

Testing out the collaboration functionality of github. Just added a few comments in your code of things I would do. Feel free to just toss this pull request if you like.
One thing I would do is to get your .cpp files in your source directory, and the .h files in your include directory.  You do this manually in file explorer and then build your project. You will get a bunch of linker errors on the build saying can't find the files you moved.  Use the error list as a reference and highlight the offending the files in the solution explorer window in VS and right-click. Select "remove" AND THEN SELECT REMOVE DO NOT SELECT DELETE!!!  I REPEAT DO NOT SELECT DELETE! This will remove the bad link in the project but leave the file alone. Then you right click on the right directory in solution explorer and select add->existing item. This will bring up file select box, go to the correct directory where you moved your files and select each one you need to add. You can select multiple files so it's not too bad. Do the same thing with the other directory and now should build AND your project files are much more organized. I would do this each time you create a new set of files and your project will be up to date and organized all the time.  Any q's, you can reply to this thread I believe or shoot me an email.