What is the most common C language standard for creating programs for the desktop OS?

Question

C++ / C#

I read that the Linux kernel uses the C90 standard, and now the most recent one is C11. At the same time, I would like to write in K&R C, but there is no longer a separate assembly mode for it. What standard is the most supported now and common among programmers for desktop OS?

Answer 1

For programs for desktop OS C, in principle, has not been particularly common for thirty years.
If you are going to write something so hardcore, then can't you yourself manage to find a compiler for any OS that supports the standard you need?

Answer 2

I read that the Linux kernel uses the C90 standard,

c99 is used in linux.
It will pass.
in the world of gcc and clang, c11 has been selected by default for several years, and it seems that c99 has not yet been delivered to the Windows cl.