新手问题，从当前页面传值到 edit.php，传不过去。<td align="center"> <a href="edit.php?id=$id">修改</a></td> 这句话错了吗

while($row2=mysql_fetch_array($result2))
{
$num = $num+1;

$id = $row2["CID"]
?>
<tr>
<td align="center"><b><?php echo $num ?></b></td>
<td align="center"><?php echo $row2["Cname"] ?></td>
<td align="center"><?php echo $row2["Cage"] ?></td>
<td align="center"><?php echo $row2["Csex"] ?></td>
<td align="center"><?php echo $row2["Cphone"] ?></td>
<td align="center"><?php echo $row2["HouseID"] ?></td>
<td align="center"><?php echo $row2["Cnum"] ?></td>
<td align="center"> <a href="edit.php?id=$id">修改</a></td>

</tr>
<?php
}