You don't say for what OS or what compiler..
Codeblocks-EP ("EDU-Portable", an unofficial
Windows only distribution not supported on these forums) comes with pre-installed FLTK library and FLUID tool under the MinGW compiler.
FLTK projects are offered in the "New from template..." project window.
The pre-compiled (static) libs and headers are in subdirectory ..\sdk\fltk
http://codeblocks.codecutter.orgStroustrup's fltk code should compile with that. I am not too sure of his hash-map, vector and string code. His book should tell you whether he has made sure these work with MinGW.