The books says that everything in the book is command line based.
what i think it means and from what i know is this(from Visual Studio experiance):
and IDE like Visual Studio which stromchin so kindly mentioned and Dev-C++ are a way of Graphically editing it (as opposed to writeing code in a standard text editor) (and i vouch for Visual Studio as it is very good in my opinion)
but it is still compiled through the 'Command Line', IE VS can do error checking, Syntax and so on but it uses the 'Command Line' to tell MSBUILD to compile your app with all relevent data and such (i may be a bit off here but as far as i know this is correct) and then VS attaches its debugger to your exe.
does that help ?