Very Computer

by **Marc** » Sat, 16 Feb 2002 00:33:47

Hello,

is there a simple way to convert a number to its ASCII representation.
eg : 65 => 'A'

Thanks in advance.

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by **Derek M. Flyn** » Sat, 16 Feb 2002 02:26:06

> is there a simple way to convert a number to its ASCII representation.
> eg : 65 => 'A'

I would have thought that printf(1) would be the best way, but it doesn't
seem to work. However, any means of getting at the actual printf(3) will
give you what you want. An example in awk is:

$ awk 'BEGIN { printf("%c\n", 65); exit }'
A

by **Robert Sherm** » Sat, 16 Feb 2002 02:27:26

> Hello,

> is there a simple way to convert a number to its ASCII representation.
> eg : 65 => 'A'

well, it ain't shell, but...
perl -e 'print chr(65) . "\n"'

solaris has a chart of hex/oct to ascii in /usr/pub/ascii...
you could parse that. the man page has a decimal version, though
the actual file does not...hmmm....

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robert sherman
css3, school of civil and environmental engineering
georgia institute of technology
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by **Ben Altma** » Sat, 16 Feb 2002 02:16:00

Quote:
> Hello,

> is there a simple way to convert a number to its ASCII representation.
> eg : 65 => 'A'

awk 'BEGIN { printf("%c\n", 65); }'
or more generally (if char is a value):
awk -v CHAR=$char 'BEGIN { printf("%c\n", CHAR); }'

regards,
Ben

by **Chris F.A. Johnso** » Sat, 16 Feb 2002 02:54:42

Quote:> Hello,

> is there a simple way to convert a number to its ASCII representation.
> eg : 65 => 'A'

d2c() { ## USAGE: d2c NNN - NNN = decimal number
eval echo `printf "\$'\\\x%x'\n" $1`
}

--
Chris F.A. Johnson http://cfaj.freeshell.org
===================================================================
My code (if any) in this post is copyright 2002, Chris F.A. Johnson
and may be copied under the terms of the GNU General Public License

by **Chris F.A. Johnso** » Sat, 16 Feb 2002 03:19:12

> > Hello,

> > is there a simple way to convert a number to its ASCII representation.
> > eg : 65 => 'A'

> d2c() { ## USAGE: d2c NNN - NNN = decimal number
> eval echo `printf "\$'\\\x%x'\n" $1`
> }

Slashed when trying to escape!

d2c() {
eval echo `printf "\$'\\\\\x%x'\n" $1`
}

--
Chris F.A. Johnson http://cfaj.freeshell.org
===================================================================
My code (if any) in this post is copyright 2002, Chris F.A. Johnson
and may be copied under the terms of the GNU General Public License

by **Ben Altma** » Sat, 16 Feb 2002 03:08:34

> > > Hello,

> > > is there a simple way to convert a number to its ASCII representation.
> > > eg : 65 => 'A'

> > d2c() { ## USAGE: d2c NNN - NNN = decimal number
> > eval echo `printf "\$'\\\x%x'\n" $1`
> > }

> Slashed when trying to escape!

> d2c() {
> eval echo `printf "\$'\\\\\x%x'\n" $1`
> }

It worked the original way on bash.
regards,
Ben

by **Chris F.A. Johnso** » Sat, 16 Feb 2002 03:51:37

> > > > Hello,

> > > > is there a simple way to convert a number to its ASCII representation.
> > > > eg : 65 => 'A'

> > > d2c() { ## USAGE: d2c NNN - NNN = decimal number
> > > eval echo `printf "\$'\\\x%x'\n" $1`
> > > }

> > Slashed when trying to escape!

> > d2c() {
> > eval echo `printf "\$'\\\\\x%x'\n" $1`
> > }

> It worked the original way on bash.

With only 3 slashes I get (in bash):

$ d2c 77
bash: printf: missing hex digit for \x
M

The whole thing only works, apparently, on bash and ksh93.

--
Chris F.A. Johnson http://cfaj.freeshell.org
===================================================================
My code (if any) in this post is copyright 2002, Chris F.A. Johnson
and may be copied under the terms of the GNU General Public License

by **Barry Margoli** » Sat, 16 Feb 2002 06:19:59

>is there a simple way to convert a number to its ASCII representation.
>eg : 65 => 'A'

perl -e 'print chr(65), "\n"'

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by **Peter J. Ackl** » Sat, 16 Feb 2002 17:55:37

> > is there a simple way to convert a number to its ASCII representation.
> > eg : 65 => 'A'

> Smaller than perl or awk:

> echo 65P | dc

Really neat. Although the Perl solution

perl -e 'print chr(65), "\n"'

presented by someone else, can be reduced to

perl -le 'print chr 65'

Peter

--
People say I'm indifferent, but I don't care.

by **Marc** » Sat, 16 Feb 2002 18:37:41

Thanks to all,

The solution with 'echo' doesn't work for me.
And, as I use a variable for 65, 66, etc, I use awk which works perfectly.

Thanks again.

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by **laura fairhe** » Tue, 19 Feb 2002 12:08:10

>> is there a simple way to convert a number to its ASCII representation.
>> eg : 65 => 'A'

>Smaller than perl or awk:

>echo 65P | dc

hi hactar :)

This doesn't work in all versions of 'dc', values 1-99
seem to always work but above that it's implementation
dependant and systems I've seen that fail (IIRC: HP-UX, SunOS)
output the string that is the base-100 expansion of the
value (eg; 100-> 0,1 outputs nothing 165-> 65,1 outputs A,\01 )

It's safer to use 'tr';

echo z|tr 'z' \\`echo 8o65p|dc`

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