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<!--
p.48
session3.php
-->
<?php session_start();
// File: session3.php
// Show the result of calculation
?>
<CENTER>
<FONT color=black size=4>
<?php
$op = $_POST['op']; // "add",
$num1 = $_SESSION['v1'];
$num2 = $_SESSION['v2'];
print "The num1 is $num1<BR>";
print "The num2 is $num2<BR>";
print "The operator is $op <HR>";
if($op == "add")
{ $ans = $num1 + $num2;
print "$num1 + $num2 = $ans";
}
else if($op == "sub")
{ $ans = $num1 - $num2;
print "$num1 - $num2 = $ans";
}
else if($op == "mul")
{ $ans = $num1 * $num2;
print "$num1 * $num2 = $ans";
}
else if($op == "div")
{ $ans = $num1 / $num2;
print "$num1 / $num2 = $ans";
}
else if($op == "mod")
{
$ans = $num1 % $num2;
print "$num1 % $num2 = $ans";
}
else if($op == "pow")
{
$ans = pow($num1, $num2);
print "$num1^$num2 = $ans";
}
?>
</FONT>
</CENTER>