[math-fun] Computer Mathematics Systems (was Computer Algebra Systems)

I still have the 1st edition of "Numerical Recipes" by Press et al., another classic book, and very much to my taste since the programs are written in Fortran, still my favorite language for numerical analysis. Plus I have all the programs on my computer, still good after 22 years (the programs, that is - the computer is a linux x86-64 now). But I see from the web site for the book that it is in its 3rd edition, and the language is now C++ ! Does anyone know if the book has been changed much, and if anything is gained by switching to C++ (which is not a language I'm familiar with)? Neil