Print filename and columns with awk

Question

I would like to select the column 23,24 and 27 of the 8th row.

Here is the way I have tried.

awk 'FNR == 8 {print $23,$24,$37}' file.txt

It works perfectly. However, I'm wondering how to add the corresponding file name as the $0

Then, the output should look like

file.txt colunm23 colunm24 colunm 27     <---- The 8th row.    

I'm not using gawk. Please suggest based on the version before gawk 4.0.0 Thank you.

Answer 1

Use the FILENAME variable:

awk 'FNR == 8 {print FILENAME,$23,$24,$37}' file.txt