[PHP-DEV] c and php operations

[Adir Kuhn]

Hello guys,

while I'm studing some c codes i found this page:
http://www.nicksays.co.uk/2009/05/awesome-c-exam-question/

and this code:

#include <stdio.h>
 int func (int a, int b) {
        static int c = 1;
        return a + b * (c *= -1);}
 int main () {
        int a = 2, b = 3;
        int c = func(a, b);

        a *= a++;
        b *= ++b;

        printf("%d %d %d %d\n", a, b, c, func(a, b));}

thats prints: 5 16 -1 21

then I made a similar php script:

<?php
function func ($a, $b) {
    static $c =1;
    return $a + $b * ($c *= -1);
 }

function main() {
    $a = 2;
    $b = 3;
    $c = func($a, $b);

    $a *= $a++;
    $b *= ++$b;

    printf("%d %d %d %d\n", $a, $b, $c, func($a, $b));
}
main();
?>

and for my surprise its prints: 6 16 -1 22

so, somebody know and can explain me wtf happened?

Thanks!

Adir Kuhn