Learn everything you can from the book... work it page by page, type up the examples, work with them, break them, fix them, repeat as necessary then go on to the next page... until you finish the book.
Then get copies of the standards themselves and play "Catch Up"... improving your knowledge from the standards themselves.
Programming languages change very slowly... the latest C standard is C-99 ... almost 12 years old so I wouldn't think you're in too much trouble getting started with what you've got.
The one area I'd recommend for immediate improvement is the DevC++ compiler... it's been abandoned for almost 5 years and is now horribly out of date. For C++ you might want to look into MinGW or Visual C++.
