BC html interface. PRE-PRE-ALPHA

<?php

//Bc html interface. Just for fun, it's very ugly,rude and unefficient. But works.
//Enrico Ronconi - 23 feb 2015

$timeout = 5;

$a = intval($_GET['a']);
$b = intval($_GET['b']);
$c = intval($_GET['c']);

$cifre = intval($_GET['cifre']);

if($cifre > 1000) die ("Non barare!");

$start = microtime(true);
$com = 'echo "scale = '.$cifre.'; a = '.$a.'*10^'.$_GET['ae'].'; b = '.$b.'*10^'.$_GET['be'].'; c = '.$c.'*10^'.$_GET['ce'].'; if ( (b^2-4*a*c) >= 0  ) {\"Radice 1: \"; (-b+sqrt(b^2-4*a*c))/(2*a); \"Radice 2: \"; (-b-sqrt(b^2-4*a*c))/(2*a); } else { \"Nessuna soluzione reale\" }" | timeout -s9 '.$timeout.' bc';
exec($com,$out);
$tempo = round(microtime(true)-$start,4);
echo('
<html>
<body>
Il calcolo ha richiesto circa '.$tempo.' secondi. (Timeout impostato a '.$timeout.' secondi)<p> Risultato: <p>

<hline>
<tt> '.str_replace("Radice 2:","</br></br>Radice 2:",str_replace("\\</br>","",implode("</br>",$out))).' </tt>

</body>
</html>');


?>