Untitled

<?php
$height=$_POST["height"];
$weight=$_POST["weight"];
$changm=$height/100;
$bmi=$weight/($changm*$changm);
if ($bmi!=null) {
	echo "你的BMI值是".$bmi."<br/>";
}
?>

<html>
<head>
</head>
<body>
<form name="form1" method="post" action="bmi.php">
BMI計算<br/>
身高: <input type="text" name="height" size="30"/>cm<br/>
體重: <input type="weight" name="weight" size="30"/>kg<br/>
<input type="submit" value="送出計算">
<input type="reset" value="重設">
</form>
</body>
</html>