Shell Programming and Scripting

Hi Rad
Thanks for the explanation of the code. I have made few changes just for the readability of the code. Hope I have done the changes correctly.Also I would like to know how x[length] automatically resets to 0 everytime when the length of the digit changes .for eg.if the numbers are 23,45,56,234 then x[length] is 1,2,3 and then 1 again.. I understood the rest of the code.

nawk 'BEGIN {
n=split("a b c d e f g h i j k l m n o p q r s t u v w x y z",f)
c2=c1=c=1
}
{
if (x[length] % 5 == 0)
{
close(fn);
fn="cin"f[c2]f[c1]f[c]".in"
if ((c1==n) && (c==n))
c2=c2>=n?1:++c2

c=c>=n?1:++c

if (c==1)
c1=c1>=n?1:++c1
}
x[length]=x[length] + 1
}
{ print > fn }' cin.in

Yes,
consider the following:

Code:

$ print '1
22
22
22
333
333
4444
4444'|nawk '{print $1,x[length]++}'
1 0
22 0
22 1
22 2
333 0
333 1
4444 0
4444 1
$