[prog] [C] writing last x bits...

[Jenn Vesperman]

On Fri, 2002-09-27 at 02:06, Annie Downs wrote:
>  Hey all
> 
> I only learned C last week <g> but I'm trying to write this program  that takes
> a file which is in binary and prints out the last 8 bits.. some places in the
> program it needs to be more bits than that, once 16 and once 32 but i'm hoping
> the procedure would be the same.. i'm having trouble figuring out how to deal
> with this.  anyone have any possible suggestions?
> thanks so much in advance..

The first step is retrieving the last X bits. I'll assume you have a
book which tells you how to read a file.

Try reading X bits into a temporary variable, and constantly re-writing
that variable until you reach EOF. Something like (this is in
pseudocode, not C):

c = read_from_file()
d = c;
while (c != EOF) {
	d = c;
}

Then print d in binary mode.



Jenn V.
-- 
    "Do you ever wonder if there's a whole section of geek culture 
        	you miss out on by being a geek?" - Dancer.

jenn at anthill.echidna.id.au     http://anthill.echidna.id.au/~jenn/