But isn't %[Xx] just prints out as Hexdecimal?
I just tried, and it prints out something like: 38c9616e

which consumes 8 bytes in a file. Given that unsigned long is 32 bits,
I want to use exactly 4 byte to represent it in order to save some
space.

Thanks.

Shao.

Matthew Dalton [EMAIL PROTECTED] wrote:
> Try using %X or %x instead of %ld
> 
> Shao Zhang wrote:
> > 
> > Hi,
> >         If I have an unsigned long int, instead printing out its values
> >         in string using printf("%ld\n", my_var),
> > 
> >         I would like to print it out as a 4-byte binary data. Is there
> >         any easy way to do this in C.
> > 
> >         Thanks.
> > Shao.
> > 
> > --
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-- 
____________________________________________________________________________
Shao Zhang - Running Debian 2.1  ___ _               _____
Department of Communications    / __| |_  __ _ ___  |_  / |_  __ _ _ _  __ _ 
University of New South Wales   \__ \ ' \/ _` / _ \  / /| ' \/ _` | ' \/ _` |
Sydney, Australia               |___/_||_\__,_\___/ /___|_||_\__,_|_||_\__, |
Email: [EMAIL PROTECTED]                                                  |___/ 
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