php打印输出棋盘的2种方法
下面本文章来给大家介绍php打印输出棋盘的2种方法,有兴趣的朋友不防进入参考一下哦。
例子1
<?php /** * 隔行隔列换色 * string fun_table(int $rows=9,int $cols=9) * $rows 表示行数 必须为整数 并且必须在1-20之间 * $cols 表示列数 必须为整数 并且必须在1-20之间 */ function fun_table($rows = 9, $cols = 9) { if ($rows < 1 || $rows > 20) { return "必须为整数 并且必须在1-20之间"; } if ($cols < 1 || $cols > 20) { return "必须为整数 并且必须在1-20之间"; } if ($rows != (int)($rows)) { return '行数 必须为整数'; } if ($cols != (int)($cols)) { return '列数 必须为整数'; } $str = ""; $str.= "<table cellspacing='0' width='500px' border = '1px' bordercolor='black'>"; for ($i = 1; $i <= $rows; $i++) { $str.= "<tr>"; for ($j = 1; $j <= $cols; $j++) { if (($i + $j) % 2) { $str.= "<td height='50px' bgcolor='black'>"; } else { $str.= "<td></td>"; } } $str.= "</tr>"; } $str.= "</table>"; return $str; } echo fun_table(); ?>
例子2 简单实现棋盘-for循环
实现这个棋盘首先我们想想棋盘是怎么样的,是有很多个方格组成,然后由黑色和白色的相间的方格组成。首先我们先把方格画出来。
<?php echo "<table cellspacing='0' width='500px' border = '1px' bordercolor='black'>"; for ($i = 1; $i <= 10; $i++) { echo "<tr>"; for ($j = 1; $j <= 10; $j++) { echo "<td>54im</td>"; } echo "</tr>"; } echo "</table>"; ?>
得到以下结果:(是不是有点眉目了,我们现在只要把格子上颜色就可以)
php简单实现棋盘
看到上面棋盘后,考虑下黑白格排放位置,有个规律可以发现,横排和竖排上白色格子都是基数,黑色的都是偶数,我们可以用取余的方法来判断这个格子该显示什么颜色,基数单元格我让他显示白色,偶数单元格显示黑色,基数+偶数=偶数,所以偶数单元格(黑色)我们很好找出来了。剩余的就是基数格(白色)
<?php /** 通过for循环和html实现棋盘 * */ echo "<table cellspacing='0' width='500px' border = '1px' bordercolor='black'>"; for ($i = 1; $i <= 10; $i++) { echo "<tr>"; for ($j = 1; $j <= 10; $j++) { if (($i + $j) % 2) { echo "<td height='50px' bgcolor='black'>"; } else { echo "<td></td>"; } } echo "</tr>"; } echo "</table>"; ?>
得到的效果是这样:
php简单实现棋盘

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