#!/usr/bin/perl

# Learning RPerl, Chapter 3, Exercise 2
# Print string array elements indexed by user-supplied integers

# [[[ HEADER ]]]
use RPerl;
use strict;
use warnings;
our $VERSION = 0.001_000;

# [[[ CRITICS ]]]
## no critic qw(ProhibitUselessNoCritic ProhibitMagicNumbers RequireCheckedSyscalls)  # USER DEFAULT 1: allow numeric values & print operator
## no critic qw(ProhibitExplicitStdin)  # USER DEFAULT 4: allow <STDIN> prompt

# [[[ OPERATIONS ]]]
my string_arrayref $flintstones_and_rubbles = [qw(fred betty barney dino wilma pebbles bamm-bamm)];
my integer_arrayref $input_indices          = [];

print 'Please input zero or more integers with values ranging from 1 to 7, separated by <ENTER>, ended by <CTRL-D>:', "\n";

while ( my string $input_string = <STDIN> ) {
    push @{$input_indices}, string_to_integer($input_string);
}

print "\n";
print 'Flintstones & Rubbles:', "\n";

foreach my integer $input_index ( @{$input_indices} ) {
    print $flintstones_and_rubbles->[ ( $input_index - 1 ) ], "\n";
}