<html>
<head>
<meta
http-equiv="Content-Type" content="text/html;
charset=utf-8" />
<meta
name=”author” Content=”Cüneyt KORKUSUZ” />
<title>Dairenin
Alanını Hesaplayan Program</title>
</head>
<body>
<form
id="form1" name="form1" method="post"
action="">
<table width="400"
border="1" cellspacing="1" cellpadding="1">
<tr>
<td align="center">Yarı
Çapı Gir</td>
<td
align="center"><label for="kutu1"></label>
<input type="text"
name="kutu1" id="kutu1" /></td>
</tr>
<tr>
<td colspan="2"
align="center"><input type="submit"
name="button" id="button" value=" hesapla"
/></td>
</tr>
<tr>
<td colspan="2"
align="center">Alan==
<?php
$a=$_POST["kutu1"];
$alan=3.14*($a*$a);
echo $alan;
?>
</td>
</tr>
</table>
<p> </p>
</form>
</body>
</html>
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