🚀 go-pugleaf

In article <3748@keele.keele.ac.uk> coa44@seq1.keele.ac.uk (Mark Scase) writes:
>
>Many thanks to all the people who replied to my recent question I
>posted in comp.os.msdos.programmer asking how to flush the keyboard
>buffer in Borland C under DOS.
>
>I received 3 different ways of flushing the keyboard buffer which
>worked.  They are:
>
>while (kbhit()) getch();
>while (bioskey(1)) bioskey(0);

These two are very likely the same thing.  If they are implemented in
the obvious way, however, they will miss keystrokes like F12.

>while (bioskey(1)) if (!getch()) getch();

This is a roundabout version of the others.  The difference is that if
an extended key (function or cursor key) is waiting in the buffer, it
will be flushed in one pass through the loop rather than two.  But
there's no advantage to that feature, and it makes the source program
longer.

I can understand why keyboard input is so confusing.  At a quick count I
see eight DOS and BIOS functions to take keystrokes from the buffer or
check the buffer for waiting keystrokes, or both.  No wonder people get
confused!

-- 
Stan Brown, Oak Road Systems                      brown@Ncoast.ORG

"Ingrate, n.  One who receives a benefit from another, or is otherwise
an object of charity."                          --Ambrose Bierce