<?php
header("content-type:text/html;charset=utf-8");
session_start();
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-CN" dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>简单计算机</title>
</head>
<body>
<form action="jisuan.php" method="post">
第一个数<input type="text" value="" name="num1"><br />
计算符号<select name="oper">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select><br />
第二个数<input type="text" value="" name="num2"><br />
<input type="submit" value="计算结果"><br />
</form>
</body>
</html>
<?php
$num1 = $_POST['num1'];
$num2 = $_POST['num2'];
$oper = $_POST['oper'];
$rs = 0;
switch ($oper) {
case "+":
$rs = $num1 + $num2;
break;
case "-":
$rs = $num1 - $num2;
break;
case "*":
$rs = $num1 * $num2;
break;
case "/":
$rs = $num1 / $num2;
break;
default:
echo "您输入的不正确";
}
$_SESSION['rs'] = $rs;
echo '计算结果为:' . $_SESSION['rs'];
?>
转载于:https://my.oschina.net/u/855386/blog/370885