rendered paste body<?php $n = $_POST[n]; function sqr ($cislo){ return $cislo*$cislo;} if ($n == 1){ echo "0";} elseif ($n == 2){ $u1 = ($_POST[n2]-$_POST[n1]); $u2 = ($_POST[m2]-$_POST[m1]); $uu = sqr($u1); $uv = sqr($u2); $vysledek = sqrt(sqr($u1)+sqr($u2));} else { $i = 1; while ($i<$n){ $i2 = $i+1; $x = 'n'.$i; $x2 = 'n'.$i2; $y = 'm'.$i; $y2 = 'm'.$i2; $n1 = $_POST[$x]; $n2 = $_POST[$x2]; $m1 = $_POST[$y]; $m2 = $_POST[$y2]; $u1 = $n2 - $n1; $u2 = $m2 - $m1; echo $u1."<br>"; echo $u2."<br>"; $vysledek2 = sqrt(sqr($u1)+sqr($u2)); $vysledek = $vysledek2 + $vysledek; $i++;} $konec = sqrt(sqr($_POST[n1]-$_POST['n'.$n])+sqr($_POST[m1]-$_POST['m'.$n])); $vysledek = $vysledek + $konec; } echo $vysledek;?>