刚刚学编程PHP就是计算过后输出不了结果点计算后像还原了 无 ?phperror_reporting(E_ALL ~E_NOTICE);if( isset($_POST['sub']) ){$sum="";switch($_POST['ysf']){ case ' ' : $sum=$_POST['num1'] $_POST['num2'];break;case '-' : $sum=$_POST['num1'] - $
刚刚学编程 PHP 就是计算过后输出不了结果 点计算后像还原了 <无>
<?php
error_reporting(E_ALL & ~E_NOTICE);
if( isset($_POST['sub']) )
{
$sum="";
switch($_POST['ysf'])
{
case '+' : $sum=$_POST['num1'] + $_POST['num2'];break;
case '-' : $sum=$_POST['num1'] - $_POST['num2'];break;
case '*' : $sum=$_POST['num1'] * $_POST['num2'];break;
case '/' : $sum=$_POST['num1'] / $_POST['num2'];break;
case '%' : $sum=$_POST['num1'] % $_POST['num2'];break;
}
}
echo '<br>';
?>
<HTML>
<HEAD>
<title>简单计算器</title>
</HEAD>
<body>
<table horder="0" width="400" align="center">
<form action="JSQ.PHP" meyhod="post">
<caption><h1>简单计算器</h1></caption>
<tr>
<td>
<input type="text" size="5" name="num1" value="" /><br>
</td>
<td>
<select type="text" name="ysf">
<option value="+"> + </option>
<option value="-"> - </option>
<option value="x"> x </option>
<option value="/"> / </option>
<option value="%"> % </option>
</select>
</td>
<td>
<input type="text" size="5" name="num2" value="" /><br>
</td>
<td>
<input type="submit" name="sub" value="计算">
</td>
<tr>
<tr>
<td colspan="4">
<?php
echo"计算结果 ={$sum} ";
?>
</td>
</tr>
</form>
</table>
</body>
</HTML>
