#!/usr/bin/perl

# file : mike.pl

use warnings;
use strict;

#search directory for files ending with .RPT and store the names in an array
my @files=glob("*.RPT");

my $i; my $x;
my $readline;

#open file containing expressions to search for
  open FILE, "params.txt" or die "Couldn't open the file. $!";
  my @params=<FILE>;

  close FILE;  # remember to close what you open

#for each file in array open and search for string
foreach $i (@files){
  open INPUT, "$i" or die "Couldn't open the file. $!";
  my $thisout = substr($i, 0, index($i, ".")) . ".txt";   # form the name of the output .txt file
  open OUTPUT, ">$thisout";
  while ($readline = <INPUT>){         # for each line in the input file,
    foreach $x (@params) {   # for each parameter in the list
	chomp($x);             # get rid of any newline nonsense that might be there
      if ($readline =~ m/$x/){     # if the param is in the line, print the line. 
        chomp($readline);
        print OUTPUT "$readline\n";
      }
    }
  }
  close INPUT;   # close what you open
  close OUTPUT;  # close what you open
}