topic Re: how can add two variables? in Operating System - HP-UX

how can add two variables?

mariano_4 — Thu, 22 Aug 2002 22:22:27 GMT

Example:

in the next scrip i have the next script:

-----------------------------------------
#Progrma que calcula el total de memoria #utilizada

ps aux |cut -b 34-37 |grep K | awk '{s=s+$1}\{r=s/1024}END{print r,export $r}'

ps aux | cut -b 34-37 | grep M | awk '{t=t+$1}\END{print t}'

-----------------------------------------

but i need sum both and print the result
how can doing it?

thanks

Re: how can add two variables?

harry d brown jr — Thu, 22 Aug 2002 22:39:23 GMT

Mariano,

TIMEOUT

export $r ???

Might work in LINUX but not in any UNIX that I know of, UNLESS you plan on installing GNU's AWK!

Now, how to do it:

ps aux | cut -b 34-37 | grep -e K -e M |
awk '{lenofvar=length($1);
if (substr($1,lenofvar,1) eq "K") {s=s+$1;r=s/1024}
if (substr($1,lenofvar,1) eq "M") {t=t+$1}
}
END{printf "%d/n",r;
print t}'

Can't test it, but looks good???

live free or die
harry

Re: how can add two variables?

harry d brown jr — Fri, 23 Aug 2002 00:07:55 GMT

I'd like you to take a look at this thread. It helps you and everyone else in the future:

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x022718276953d61190040090279cd0f9,00.html

And I'd like to add that you need to be more interactive with your thread so that people know what works and what doesn't.

live free or die
harry

Re: how can add two variables?

Frank Slootweg — Fri, 23 Aug 2002 08:59:17 GMT

First you have to assign the output to the variables, then add them, then print the sum.

Assign:
variable=`command`
or
variable=$(command)

Add:
((result=$var1+$var2))

Print:
echo $result

Re: how can add two variables?

Allan Pincus — Fri, 23 Aug 2002 18:56:12 GMT

Postscript to Frank's email:

((result = var1 + var2))

or

let result=var1+var2

are also both acceptable.

-Allan

Re: how can add two variables?

Martin Johnson — Fri, 23 Aug 2002 19:03:54 GMT

Harry,

Nicely, put! You are getting more diplomatic in your old age? Or are you getting tired of the flaming tirades?

:-)
Marty