Date: Mon, 10 Oct 1994 12:37:17 -0400 (EDT)
From: Kimberley Burchett <OKRA AT max DOT tiac DOT net>
Subject: Re: keyboard messups!!!! :(
To: DJGPP Mailing List <djgpp AT sun DOT soe DOT clarkson DOT edu>


On Sun, 9 Oct 1994, Curtiss Cicco wrote:

> >  do {
> >    FixRotate(x,y,angle,&x,&y);
> >    PutPixel(FixWhole(x)+160, FixWhole(y)+120, 15);
> >    while(kbhit() == 0);
> >  } while(getch() != 'q');
> >  CloseVGA();
> >}

>      From the way I see it, a "do" needs to be put up at the top of the
> code to create a nested do while. Look at the "while(getch() != 'q');"
> part, it's supposed to perform a loop until it evaluates to true, which
> in this case it automatically evaluates to true and goes onto CloseVGA().

  No, it does a loop until it evaluates to FALSE.

> On second thought, you may o r may not need to make a nested do, but
> assuming that CloseVGA() means "stop do ing graphics" or something close
> to that effect, you need to make the condition inside the second 'while'
> initially evaluate to false instead of true and that should take care of
> the problem of premature control termination. 

  The problem is _not_ premature control termination.  it goes on until I 
press 'q' and then it quits.  the problem is that the radius of the 
circle goes to less than 2 in only 10 iterations after starting at 100.
							Kim