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Full Discussion: Passing variables and setting them
Top Forums Shell Programming and Scripting Passing variables and setting them Post 302799117 by Don Cragun on Thursday 25th of April 2013 06:34:12 PM
Old 04-25-2013
Quote:
Originally Posted by hanson44
Code:
... ... ...
# Method #2

awk 'NR == a { j = $0 } NR == b { k = $0 } END { score = j - k; print score }' file
file

I think what viored didn't understand was how to get a and b into awk:
Code:
awk -v a="$a" -v b="$b" '
NR == a {j = $0}
NR == b {k = $0}
END { score = ...}' file

If $a and $b haven't already been set when you get to awk you can easily replace that first line with:
Code:
awk -v a=1 -v b=3 '

 

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LEARN ABOUT DEBIAN

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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