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awk: replace with script parameter

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# 1  
Old 06-01-2012
awk: replace with script parameter
Hi


var=0001

I want to replace 2nd field of file with variable var in file sample.txt

Please suggest with awk. dont want to use awk -v option.

pseudo code : something like this.

var=0001
awk '{ 12193 /var } {print $0 }' sample.txt
# 2  
Old 06-01-2012
try like this.
Code:
$>cat sample.txt
A B C
D S E
P Q R
$>var=0001
$>awk '$2="'"$var"'"' sample.txt
A 0001 C
D 0001 E
P 0001 R

# 3  
Old 06-02-2012
Code:
awk '{$2=v}1' v="$var" file

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