topic Re: scripting question in Operating System - HP-UX

scripting question

Charles McCary — Mon, 14 May 2001 18:11:39 GMT

Group,

Anyway to add two decimal numbers of differing precision in a ksh script?

tx,

C

Re: scripting question

James R. Ferguson — Mon, 14 May 2001 18:23:30 GMT

Hi Charles:

Try this:

echo "1.11 + 3.3"|bc

...JRF...

Re: scripting question

Abel Berger — Tue, 15 May 2001 17:18:32 GMT

For example :

set typ -i x
x=`echo 100.99 + 200.88 | bc`
echo $x

Re: scripting question

Abel Berger — Tue, 15 May 2001 17:19:07 GMT

For example :

set type -i x
x=`echo 100.99 + 200.88 | bc`
echo $x

Re: scripting question

Johannes Falk — Wed, 16 May 2001 11:40:22 GMT

Oops,
set type -i x
is nonsense! This sets $1 to "type", $2 to "-i" and $3 to "x"

But a typeset -i x
would set $x to integer, and this is not usefull here, because the
result is a float.

So simply use:
$ x=$(echo "1.11+3.3"|bc); echo "$x"
4.41
is ok

By the way, mind the precision in bc:
$ echo 'scale=6; 10/3' | bc
3.333333
$ echo 'scale=3; 10/3' | bc
3.333
$ echo '10/3' | bc
3

Hanno

Re: scripting question

Abel Berger — Thu, 17 May 2001 18:36:26 GMT

Hi Falk,

I MADE THE TEST AND ITS FUNCTIONED.
I WOULD LIKE THAT YOU MADE TOO.
THEREFORE WHEN YOU USE BC COMMAND THE
INTEGER VARIABLE BECOMES FLOATING,

OK.

Re: scripting question

Johannes Falk — Fri, 18 May 2001 08:03:01 GMT

Hi Abel,

I didn't understand your last question but I tested this:
c13:/tmp$ x=$(echo "1.11+3.3"|bc); echo "$x"
4.41
c13:/tmp$ typeset -i x
c13:/tmp$ x=$(echo "1.11+3.3"|bc); echo "$x"
4

So x remains an int if it is set so,
and the result becomes truncated.

Re: scripting question

Abel Berger — Fri, 18 May 2001 12:22:08 GMT

Hi Falk,

The problem among my test and your test is
the ` `. Your test use () and $ therefore the
results are different.
Test makes equal mine is above and looks at the result. OK !

Regards...
Abel Berger