awk command in script?

Hello:
Does anyone know how to use ‘awk’ in a script?  It must have a
different syntax than the unix analog, as does the ‘grep’ command.
For grep, the syntax in the c-shell is:
“grep ‘string’ , but for Perl the delimiters are slashes: $x = grep /
string/ line.
Maybe the same thing is going on with Perl.

I have searched the following sources with no help on awk:

perldoc  -f   ‘awk’
‘Beginning Perl’ by S. Cozen
‘CGI101’
and the O’Reilly books:
‘Learning Perl’ aka the llama book
‘Intemediate Perl’
‘Advanced Perl’
‘CGI Programming with Perl’

I have a file called /tmp/file.txt with one line:

field       xxxx

for grepping on xxxx, the script is:


#!/usr/bin/perl -w
use CGI::Carp qw(fatalsToBrowser);
use CGI qw(:standard -no_xhtml);
#use CGI ':standard';
use strict;
use diagnostics;
my $q = new CGI;
print $q->header;
print $q->start_html(-title=>"mygrep");


my @infile;
my $q = new CGI;
open (FILEIN, "/tmp/file.txt") or die "Can't open /tmp/file.txt for
reading: $!\n!";
open (FILEOUT, ">/tmp/out.txt") or die "Can't open /tmp/out.txt for
writing: $!\n!";
system "chmod 755 /tmp/out.txt";


while ( defined(my $line=<FILEIN>) ){
     chomp($line);
     push (@infile,$line);
}

my @zoom = grep(/xxxx/,@infile);          #looks for 'xxxx' in @infile

foreach (@zoom){
        print $q->center($q->h3("\nNext line containing 'xxxx' is:
\n"),
        $q->h3("$_\n"),
        $q->h3("_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _")  );
}

print $q->center($q->h2(" grep program is finished!\n"));

_______________________________________________________________________



The script works as it should for grep, but what if I want to output
$NF (=xxxx) when a line has the string  ‘field’ in it?  There must be
a way, but I can't find it.

Thank you.
Mary