But that is where I disagree.
Your code is broken in that it relies on race conditions.
And the fact that it uses a busy loop is unacceptable--at least to me--under any circumstance unless you can prove there is no better way to do it.
Originally Posted by Adak
io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
Originally Posted by Salem
You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.
Outside of your DOS world, your header file is meaningless.