That is not C, but a non-standard extension and thus not portable.
> non-standard extension and thus not portable
Modern versions of standard C aren't very portable either, unless you plan to stick to the original version of K&R C you have to pick and choose which implementations you plan to support.
> non-standard extension and thus not portable
Modern versions of standard C aren't very portable either, unless you plan to stick to the original version of K&R C you have to pick and choose which implementations you plan to support.