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awk to print blank line between files

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# 1  
Old 02-23-2016
awk to print blank line between files
I have an AWK command that goes like this:

Code:
awk '/from BOITE_AUX_LETTRES/,/end-procedure|END-PROCEDURE|end-select|END-SELECT/ {print FILENAME,FNR,$0}' *prp

I get my results as follows:

Code:
ZKELEXTV2.prp 16 from BOITE_AUX_LETTRES(#num_lettre)
ZKELEXTV2.prp 23   LET $CONDEXTR = ' where a.id_affaire       = '|| to_char( #id_classeur) 
ZKELEXTV2.prp 25   LET $CONDEXTR = 'where 1 = 2'
ZKELEXTV2.prp 43 get $dt_form    from BOITE_AUX_LETTRES(0)       dt_form
ZKELEXTV2.prp 112 from  affaire a
ZKELEXTV2.prp 113 [$CONDEXTR]
ZKELEXTV4.prp 15 from BOITE_AUX_LETTRES(#num_lettre)

What I wnat is to print a blank line when extraction from one file ends and begins another one.
In my example, a blank line betwwen the last line in ZKELEXTV2.prp and the first one in ZKELEXTV4.prp
Can you please guide me through it?
Thanks a lot.
Last edited by Scrutinizer; 02-23-2016 at 12:32 PM.. Reason: CODE tags
# 2  
Old 02-23-2016
Please use code tags as required by forum rules!

Try
Code:
FNR == 1 && FNR != NR {print ""}

# 3  
Old 02-24-2016
try also in the print statement:
Code:
print (NR!=FNR && !a[FILENAME]++) ? "\n" : "", FILENAME, FNR, $0

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