个人作业及PHP作业
<?php
$values = '';
if(!empty($_POST)){
$num1 = $_POST['num1'];
$num2 = $_POST['num2'];
$operator = $_POST['operator'];
switch ($operator){
case '1':
$values = $num1 + $num2;
break;
case '2':
$values = $num1 - $num2;
break;
case '3':
$values = $num1 * $num2;
break;
case '4':
$values = $num1 / $num2;
break;
}
}
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<form method="post">
<input type="text" name="num1">
<select name="operator">
<option value="1">+</option>
<option value="2">-</option>
<option value="3">*</option>
<option value="4">/</option>
</select>
<input type="text" name="num2">
<input type="submit" value="=">
<input type="text" value="<?php echo $values; ?>"><br>
</form>
</body>
</html>