Re: stdio

[Jan-Benedict Glaw <jbglaw@lug-owl.de>]

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On Wed, 2003-06-18 05:58:42 -0400, John T. Williams <jtwilliams@vt.edu>
wrote in message <011801c33580$48425aa0$e764a8c0@fesnel.noip.org>:
> I am trying to figure out how to cause a character to be printed to a
> specific place on the terminal
> 
> what I'm actually trying to accomplish is to make a progress bar
> 
> example:
> 
> Progress [*****                           ]  25%
> 
> and I want it to fill up the box with stars as my program progresses, but I
> can't figure out how to just get c to write a single '*'  to anywhere other
> then the end of the streak
> I tried lseek and got no good results.

Well, what you want to do sounds quite simple, but it's really quite
complicated. The basic problem is that there are thousands of different
terminal types out there which need different control sequences to
position the cursor (if possible at all). You would need to know all of
them to be portable.

Because that would be a real PITA, this functionality has been placed
into some libraries. Look for libncurses (of libtermcap) to do this
task...

MfG, JBG

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