<?php

	$a = $_GET["a"];
	$b = $_GET["b"];
	$c = $_GET["c"];

	switch ($c) {
		case "+":
			echo $a + $b;
			break;
		case "-":
			echo $a - $b;
			break;
		case "*":
			echo $a * $b;
			break;
		case "/":
			echo $a / $b;
			break;
	}

		echo("<br />
		<br />
		<br />
		<a href=\"/test.php?a=$a&b=$b&c=%2B\">+</a>
		");

		echo("<br />
		<br />
		<br />
		<a href=\"/test.php?a=$a&b=$b&c=-\">-</a>
		");

		echo("<br />
		<br />
		<br />
		<a href=\"/test.php?a=$a&b=$b&c=*\">*</a>
		");

		echo("<br />
		<br />
		<br />
		<a href=\"/test.php?a=$a&b=$b&c=/\">/</a>
		");

?>