Programme à la con qui dit si l'année est bissextile. En PHP et en Ruby. PS : Il semble que PHP ne gère pas très bien les grands nombres.

bissextile.php

#!/usr/bin/env php                                                 

<?php
function isItLeapYear($year) {
  if ($year % 400 == 0)
    return true;
  elseif ($year % 4 == 0) {
      if ($year % 100 == 0)
        return false;
      else
        return true;
  }
  else
    return false;                                                  
}

echo "Enter a year : ";
fscanf(STDIN, "%d\n", $year);
$isLeapYear = isItLeapYear($year);
if ($isLeapYear)
  echo $year . " is a leap year\n";
else
   echo $year . " isn't a leap year\n";
?>

bissextile.rb

#!/usr/bin/env ruby                                                

def isLeapYear? year = 0
  if year % 400 == 0
    true
  elsif year % 4 == 0
    if year % 100 == 0
      false
    else
      true
    end
  else
    false
  end
end

printf "Enter a year : "
year = $stdin.readline.strip.to_i
isLeapYear = isLeapYear? year
puts "#{year} is a leap year" if isLeapYear
puts "#{year} isn't a leap year" unless isLeapYear

Output

Output Ruby :

Enter a year : 4564894532165189416891189189198198189181981189489487846454564545648948979465418944132
4564894532165189416891189189198198189181981189489487846454564545648948979465418944132 is a leap year

Output PHP :

Enter a year : 4564894532165189416891189189198198189181981189489487846454564545648948979465418944132
9223372036854775807 isn't a leap year