Generally, in a debate, if your opposition doesn't have any evidence to support their claims, the only thing you have to accept is victory.
However, if they ask me to clarify, I can still enlighten them on my opinions or logic on the matter without claiming victory.
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.