develooper Front page | perl.beginners | Postings from September 2009

RE: decimal to binary?

Thread Previous | Thread Next
Bob McConnell
September 23, 2009 12:32
RE: decimal to binary?
Message ID:
From: Uri Guttman

>>>>>> "BM" == Bob McConnell <> writes:
>   BM> From: Bryan R Harris
>   >> 
>   >> I need to convert a number like this:   -3205.0569059
>   >> ... into an 8-byte double (big and little endian), e.g. 4f 3e 52
00 2a
>   BM> bc 93
>   >> d3  (I just made up those 8 byte values).
>   >> 
>   >> Is this easy in perl?  Are long and short ints easy as well?
>   BM> The sprintf() family is your friend.
> that will only generate text (hex and other formats). he needs pack
> which does exactly what he wants. read perlpacktut for a tutorial on
> pack/unpack and then perlfunc -f pack for the reference on it.

That statement just confuses me. His initial value of -3205.0569059 is
also text. It is the human readable representation of the number, and is
not anything like what it looks like inside the computer. He just asked
for a different format for that text. Why is sprintf not a reasonable
way to do that?

Bob McConnell

Thread Previous | Thread Next Perl Programming lists via nntp and http.
Comments to Ask Bjørn Hansen at | Group listing | About