Help with script....awk

[Bandit390]

I want to take user specified columns from two files and join them into one file.

I store column input from the user into columns1.txt and columns2.txt. I use sed to convert input from "5 6 7" to "$5$6$7"

I want to use awk for getting the columns...ex

awk ' {print columns1.txt }' file1

But of course using columns1.txt doesn't work. So how do I take whats inside the file and use it to express inside awk for the columns I want?

If there is a better way about doing the whole thing, I'm all open for suggestions.

[burschik]

Assuming columns1.txt contains something like "5 6 7", try something like this:

cut -f $(sed 's/ \+/,/g' columns1.txt) file1