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sumofsquares.php
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sumofsquares.php
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<?php
/*
* sumofsquares.php
*
* Copyright 2015 Ajay Bhatia <prof.ajaybhatia@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*
*/
function square($n) {
return $n * $n;
}
function sumofsquares($n, $sum = 0) {
if ($n == 0)
return $sum;
else {
$sum += square($n);
return sumofsquares($n - 1, $sum);
}
}
echo "Sum of sqaures till " .
$argv[1] . " is " .
sumofsquares($argv[1]) . "\n";
?>