use warnings;
use strict;

die "Enter proper CLI arugments: ......."
  unless @ARGV == 2;    ## check your arguments passed from CLI

my ( $num1, $num2 ) = show_now(@ARGV);

print $num1, "\t", $num2, $/;

sub show_now {
    my ( $inp1, $inp2 ) = @_;
    print "inp1 is $inp1 inp2 is $inp2\n";

    my ( $opt1, $value1, $opt2, $value2 ) = "";
    if ( $inp1 =~ /rel=.+?/i ) { ## changed the regex
        ( $opt1, $value1 ) = split( /=/, $inp1 );
    }

    if ( $inp2 =~ /file=.?+/i ) { ## changed the regex
        ( $opt2, $value2 ) = split( /=/, $inp2 );
    }

    if ( $inp1 !~ /rel=.+?/i or $inp2 !~ /file=.+?/i ) {
        print "\n[Error] - Wrongly passed the parameter.\n";
        print "          Please use correct format as below\n";
        print
"\n[Example] - <scriptname> rel=<release> file=<file_name>(\$script_name rel=102b file=
ccmsg.1)\n\n";

        #exit;  ## not really needed
    }

    return ( $value1, $value2 ) if wantarray();

}