加法计算器

admin · 发表于 2013-10-2 20:32:30

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>加法计算器</title>
</head>
<body>
<blockquote>
<blockquote>
<blockquote>
<p class="STYLE1">加法计数器</p>
</blockquote>
</blockquote>
</blockquote>
<form id="form1" name="form1" method="post" action="">
<label>
<input name="number1" type="text" id="number1" size="10" />
</label>
+
<label>
<input name="number2" type="text" id="number2" size="10" />
</label>
<label>
<input type="submit" name="Submit" value="等于" />
</label>
<?php
if(isset($_POST['Submit']) and $_POST['number1']!=null and $_POST['number2']!=null and $_POST['Submit']=="等于"){
$number3=$_POST['number1']+$_POST['number2']; //计算变量
}else{
$number3=null;
}
?>
<label>
<input name="number3" type="text" id="number3" size="10" value="<?php echo $number3;?>"/>
</label>
</form>
</body>
</html>

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