Shell Programming and Scripting

Originally Posted by Aia

They can be run as it from the command line interface.

Originally Posted by Aia

I am assuming you are executing this:

Code:

cat numberfile.txt | while read num
do

        if [ `echo "${num} % 2" | bc` -eq 0 ] 
        then  
                echo ${num} >> even.numbers.txt
        else
                echo ${num} >> odd.numbers.txt
        fi
done

If so, that contains an error. Add the red part.

Originally Posted by TranceC

Just tried it with the addition. It took all the numbers from numbers.txt and put it into odd.numbers.txt

Originally Posted by Aia

The first script requires to have the program `bc' installed.
Try any of the awk solutions, they both do the same with different syntax.

---------- Post updated at 11:39 AM ---------- Previous update was at 11:28 AM ----------



That means this part:

Code:

if [ `echo "${num} % 2" | bc` -eq 0 ]

is evaluating always to 0, which could be an indication that read is not getting the right information an num is does not translate to a number.

Could you post a few lines of your number.txt file?

Originally Posted by TranceC

Do i have to make a seperate file for this one, so it opens the numbersfile.txt or? Not sure what im getting myself into



As i said, im new to this scripting and unix, so go easy on me

im guessing that FILENAME is the name of my file with numbers in it. And the file is the output? I seem to be getting an error saying something about it not being able to open "file".