Awk oddity

[David Goodenough]

ado at elsie.UUCP (Arthur David Olson) asks:
> A three-part exercise:
> 
> 1.	Write and test an awk script to print all input lines that contain
> 	the character 'x'.
> 2.	Write and test an awk script to print all input lines that contain
> 	the character '='.
> 3.	Comment on the results.

1.
--- cut here --- cut here --- cut here --- cut here --- cut here ---
#! /bin/sh

awk '{
	for (i = 1; i <= length($0); i++)
	  if (substr($0, i, 1) == "x")
	    print $0
     }'
--- cut here --- cut here --- cut here --- cut here --- cut here ---

2.
--- cut here --- cut here --- cut here --- cut here --- cut here ---
#! /bin/sh

awk '{
	for (i = 1; i <= length($0); i++)
	  if (substr($0, i, 1) == "=")
	    print $0
     }'
--- cut here --- cut here --- cut here --- cut here --- cut here ---

3.
Huh?

Like the man said, "There's no problems, only solutions"
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