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<?php
session_start()
?>
<!DOCTYPE html>
<html>
<body>
<?php
$num1 = $_SESSION['f0']['num1'];
$num2 = $_SESSION['f0']['num2'];
print "First operand is $num1<br />Second operand is $num2<br
/>Operator is '{$_POST['op']}'<br />";
print "$num1 {$_POST['op']} $num2 = ";
if ($_POST['op'] == '+') {
print $num1 + $num2;
} else if ($_POST['op'] == '-') {
print $num1 - $num2;
} else if ($_POST['op'] == '*') {
print $num1 * $num2;
} else if ($_POST['op'] == '/') {
if ($num2 == 0) {
print "Error. Cannot divide $num1 by $num2 because second operand
is
zero.";
} else {
print $num1 / $num2;
}
} else if($_POST['op'] == '%') {
while ($num1 > $num2) {
$num1 -= $num2;
}
print $num1;
} else {
$tmp = $num1;
while ($num2 > 1) {
$num1 *= $tmp;
$num2--;
}
print "$num1";
}
?>
</body>
</html>