PHP Ack Examples

Example #1

File: ackermann.php Project: michaelprem/phc

function Ack($m, $n)
{
    if ($m == 0) {
        return $n + 1;
    }
    if ($n == 0) {
        return Ack($m - 1, 1);
    }
    return Ack($m - 1, Ack($m, $n - 1));
}

Example #2

File: ackermann.php Project: jenalgit/roadsend-php

function Ack($m, $n)
{
    $m = (int) $m;
    $n = (int) $n;
    if ($m == 0) {
        return $n + 1;
    }
    if ($n == 0) {
        return Ack($m - 1, 1);
    }
    return Ack($m - 1, Ack($m, $n - 1));
}

Example #3

File: hash1.php Project: michaelprem/phc

function ackermann()
{
    $r = Ack(3, 7);
    print "Ack(3,7): {$r}\n";
    $r = Ack(3, 6);
    print "Ack(3,6): {$r}\n";
    $r = Ack(3, 6);
    print "Ack(3,6): {$r}\n";
    $r = Ack(3, 5);
    print "Ack(3,5): {$r}\n";
    $r = Ack(3, 5);
    print "Ack(3,5): {$r}\n";
    $r = Ack(3, 5);
    print "Ack(3,5): {$r}\n";
}

Example #4

File: simple.php Project: michaelprem/phc

function ackermann($n)
{
    $r = Ack(3, $n);
    print "Ack(3,{$n}): {$r}\n";
}

Example #5

File: dce_ack.php Project: michaelprem/phc

<?php

// The $TEMP = 1 from $n+1 should be DCEd.
// { phc-option: -O3 --dump=codegen }
// { phc-regex-output: !/= 1/ }
function Ack($m, $n)
{
    if ($m == 0) {
        return $n + 1;
    }
}
$r = Ack(3, 3);
print "Ack(3,{$n}): {$r}\n";

Example #6

File: test.php Project: dw4dev/Phalanger

 static function ackermann()
 {
     Timing::Start("ackermann.php");
     /*print "Ack(3,7): " .*/
     Ack(3, 7);
     Timing::Stop();
 }