初学 php ,很多都不懂,能不能指导一下这两道题目更好的解法,谢谢
<html>
<body><table border="1" cellpadding="0" cellspacing="0">
<tr>
<td width=300>
a
<br />
<br />
<br />
</td>
<td width=300>
<br />
b
<br />
<br />
</td>
</tr> <tr>
<td>
c
<br />
<br />
<br />
</td> <td>
<br />
<br />
d
</td>
</tr>
</table>
</body>
</html><html>
<body>
<?php
for ($i=8; $i>=4; $i=$i-2) {
for ($k=8-$i; $k>0; $k--) {
echo " ";
}
for ($j=$i; $j>0; $j--) {
echo "*";
}
echo "<br>";
}
echo " *";
?></body>
</html>
<html>
<body><table border="1" cellpadding="0" cellspacing="0">
<tr>
<td width=300>
a
<br />
<br />
<br />
</td>
<td width=300>
<br />
b
<br />
<br />
</td>
</tr> <tr>
<td>
c
<br />
<br />
<br />
</td> <td>
<br />
<br />
d
</td>
</tr>
</table>
</body>
</html><html>
<body>
<?php
for ($i=8; $i>=4; $i=$i-2) {
for ($k=8-$i; $k>0; $k--) {
echo " ";
}
for ($j=$i; $j>0; $j--) {
echo "*";
}
echo "<br>";
}
echo " *";
?></body>
</html>
2是问数列
自己斟酌