There aren't any real reasons I have for choosing C89 over C99. Both tend to be very portable, which is very nice if you aren't sure what operating system you a

There aren't any real reasons I have for choosing C89 over C99. Both tend to be very portable, which is very nice if you aren't sure what operating system you are running on (if any, in many situations). I still write many programs using the "-std=c99" flag, but I never find myself in dire need of the extensions, basically honorary ANSI C. For projects like this that just do numerical processing, C89 C really isn't that much more of a hassle.