c++ offers better manipulation tools than c, but knowing a little of both would be an asset in the workplace should a future employer ask you to translate a c program into c++
I think that downloading source code for working programs is far more beneficial as is reading through the headers than is reading over tutorials. You might not understand everything that you read in the source code, but you play with a working program (hopefully) and see what each call or section of code does.
Most tutorials are usually too basic or too broad to be of any practical use.....
You can download source snippits for all levels from wrox press. Or you used to be able to. http://www.wrox.com/dynamic/books/download.aspx
Looks like they've changed the format again.
