use strict;
use warnings;

my @ARGV = qw(-infile data_in.bin -outfile data_out.bin);

my %args;

for ( 0 .. $#ARGV / 2 ) {
    my $switch = shift(@ARGV);
    my $value  = shift(@ARGV);
    $args{$switch} = $value;
}

print "Infile: $args{-infile}\n", "Outfile: $args{-outfile}" if ( exists $args{-infile} && exists $args{-outfile} );

##</code><code>##

my %hash = { key => [value_1, value_2, value_3, value_4]};