<?php  ### dreieck.php ### utf-8 ### ÄÖÜäöü

header('Content-Type: text/plain; Charset=utf-8');
set_time_limit(0);
ignore_user_abort(true);

$runs = 100000;
if (isset($_GET['runs']) && (intval($_GET['runs']) > 0) && (intval($_GET['runs']) <= 1000000)) 
{
    $runs = intval($_GET['runs']);   
}

$time = date ('Ymd-His');
$filename = 'log-' . $time . '.txt';
$resultfile = 'results.txt';


while (ob_get_level()) { ob_end_clean(); }

$strecke = 1.0;
$no = 0;

for ($i = 1; $i <= $runs; $i++)
{
	$faktor = mt_rand(0, mt_getrandmax());

    $result = '';
    $ab = 1/mt_getrandmax() * $faktor;
    
    if ($ab < 0.5)
    {
        $faktor = mt_rand(0, mt_getrandmax());

        $bc = (1-$ab)/mt_getrandmax() * $faktor;
        $cd = 1 - $ab - $bc;

        $result = "Dreieck, ab = $ab \t bc = $bc \t cd = $cd" . PHP_EOL;
        
        if ($bc >= 0.5 || $cd >= 0.5)
        {
            $no++;
            $result = "kein Dreieck, ab = $ab \t bc = $bc \t cd = $cd" . PHP_EOL;            
        }
    }
    else
    {	
        $result = "kein Dreieck, ab = $ab" . PHP_EOL;
        $no++;
    }

	file_put_contents($filename, $result, FILE_APPEND);

    ###  aller 1000 Versuche ein Lebenszeichen geben    
    if ($i % 1000 == 0)
    {
        echo "$i\r\n";	
        flush();
        flush();
    }    
} 

$ergebnis = 'Versuche = ' . $runs . PHP_EOL . 'Fehlanzeigen = ' . $no . PHP_EOL . 'Wahrscheinlichkeit = ' . (1-($no/$i)) . PHP_EOL;

file_put_contents($filename, PHP_EOL . $ergebnis, FILE_APPEND);
file_put_contents($resultfile, PHP_EOL . $time .', ' . $ergebnis . PHP_EOL, FILE_APPEND);


echo "\r\n$ergebnis";




?>