<?php  session_start();  ?>
<!--
	Title: assignment4b_3.php
    Author: Maurice Reed
    Instructor: Dr. Wang
	Due: 2/24/2015
	Goal:   (b) Based on the general calculator in Page. 43-45,
	add the additional operations of modulus (a%b) and power (ab)
	to the second page.
 -->
<FONT color=blue 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")
{
	if($num2 == 0)
	{print "Can't divide by zero";}
	else
	{ $ans = $num1 / $num2;
	print "$num1 / $num2 = $ans";
	}
}
else if($op == "mod")
{ $ans = fmod($num1, $num2);
print "$num1 % $num2 = $ans";
}
else if($op == "power")
{
$ans = pow((float)$num1, (float)$num2);

print "$num1 ^ $num2 = $ans";
}
?>
</FONT>