Hey guys. I often use C language to make programs as part of my PhD studies. I'm physicist an work on Linux, so I use GSL library (it has a lots of C written functions for making practically anything in Mathematics using C). This library is fully based on the C89 standard. So, my questions is concerned about on which C standard are based the famous books (several editions) written by Paul Deitel and Harvey Deitel, I meant specifically the “C How to Program” series.
I'm concerned about that because it is important for me write all my code in a portable way and strictly based on the C89 standard, which is the one used by the GSL. I would like to use the mentioned book as reference for my C projects.
Thanks in advance