#!c:/perl/bin/perl -w
$|++;

use strict;

my @questions = (
   {
      question => 'What perl site is a great learning tool?',
      answers  => {
         perlmonks   => 1,  # 1 for correct answer
         javajunkies => 0,  # 0 for incorrect answer
         microsoft   => 0
      }
   },

   {
      question => 'Pick a valid color:',
      answers  => {
         red   => 1,  # multiple correct answers
         blue  => 1,  # permitted
         sheep => 0,
         cow   => 0
      }
   }
);

my $correct = 0;

for my $question (@questions) {
   print "\n\nQ: ", $question->{'question'}, "\n",
      'A: ', join(', ', keys %{$question->{'answers'}}), "\n\n";

   print 'Your answer: ';
   chomp( my $ans = <STDIN> );

   ++$correct if ($question->{'answers'}->{lc $ans});
}

print "\n\nYour grade is ", +(int($correct/@questions*100)), "%.\n",
   "You answered $correct questions correctly.\n\n";