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| Author |
Debug my 4-lines script calling awk from awk (recursive factorial algorythm)
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| Laurent Schneider 2004-07-16, 8:55 am |
| Hi,
I am here calling awk from awk. This script does execute a factorial.
However, it is buggy, since it does not work when you enter a value
for the second time. I cannot explain that !!!
Good luck and thanks for help ;-)
Laurent
$ cat bug.awk
$2 != 1 { printf $1"! = " }
{ n=1 }
$1 > 2 { "echo "($1-1)" 1|awk -f fact.awk" | getline n }
/./ { print n*$1 }
$ echo 3 4 5 3 4 5 | tr ' ' '\n' | awk -f bug.awk
3! = 6
4! = 24
5! = 120
3! = 3
4! = 4
5! = 5
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| try:
$2 != 1 { printf $1"! = " }
{ n=1 }
$1 > 2 { cmd= "echo "($1-1)" 1|awk -f fact.awk"; cmd | getline n; close(cmd) }
/./ { print n*$1 }
--
pop is Mark
I'm lost. I've gone to look for myself.
If I should return before I get back, keep me here.
--
"Laurent Schneider" <laurentschneider@yahoo.com> wrote in message
news:fe0e47b1.0407160017.1b6a0a10@posting.google.com...
> Hi,
> I am here calling awk from awk. This script does execute a factorial.
> However, it is buggy, since it does not work when you enter a value
> for the second time. I cannot explain that !!!
>
> Good luck and thanks for help ;-)
> Laurent
>
>
> $ cat bug.awk
> $2 != 1 { printf $1"! = " }
> { n=1 }
> $1 > 2 { "echo "($1-1)" 1|awk -f fact.awk" | getline n }
> /./ { print n*$1 }
>
> $ echo 3 4 5 3 4 5 | tr ' ' '\n' | awk -f bug.awk
> 3! = 6
> 4! = 24
> 5! = 120
> 3! = 3
> 4! = 4
> 5! = 5
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| Laurent Schneider 2004-07-16, 3:55 pm |
| ok very clear, thanks a lot
Laurent
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