Oh yes, it's amazing indeed.
I remember the old computer that was 133 MHz with around 2 or 4 MB or ram I think, can't remember clearly.
Then I got a 266 MHz computer, but with memory unknown.
I wasn't into the computer market yet at that time
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.