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php打印输出棋盘的2种方法

May 25, 2016 pm 04:46 PM
for loop

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)($rows)) {
        return &#39;行数 必须为整数&#39;;
    }
    if ($cols != (int)($cols)) {
        return &#39;列数 必须为整数&#39;;
    }
    $str = "";
    $str.= "<table  cellspacing=&#39;0&#39; width=&#39;500px&#39; border = &#39;1px&#39; bordercolor=&#39;black&#39;>";
    for ($i = 1; $i <= $rows; $i++) {
        $str.= "<tr>";
        for ($j = 1; $j <= $cols; $j++) {
            if (($i + $j) % 2) {
                $str.= "<td height=&#39;50px&#39; bgcolor=&#39;black&#39;>";
            } else {
                $str.= "<td></td>";
            }
        }
        $str.= "</tr>";
    }
    $str.= "</table>";
    return $str;
}
echo fun_table();
?>
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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=&#39;0&#39; width=&#39;500px&#39; border = &#39;1px&#39; bordercolor=&#39;black&#39;>";
for ($i = 1; $i <= 10; $i++) {
    echo "<tr>";
    for ($j = 1; $j <= 10; $j++) {
        echo "<td>54im</td>";
    }
    echo "</tr>";
}
echo "</table>";
?>
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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=&#39;0&#39; width=&#39;500px&#39; border = &#39;1px&#39; bordercolor=&#39;black&#39;>";
for ($i = 1; $i <= 10; $i++) {
    echo "<tr>";
    for ($j = 1; $j <= 10; $j++) {
        if (($i + $j) % 2) {
            echo "<td height=&#39;50px&#39; bgcolor=&#39;black&#39;>";
        } else {
            echo "<td></td>";
        }
    }
    echo "</tr>";
}
echo "</table>";
?>
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得到的效果是这样:

php简单实现棋盘


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