就像上面图片里面所画的一样，我怎么把那一串数字用二叉树存起来？用php实现。
求大神帮忙呀！！！！
==========初学二叉树
------解决方案--------------------
这个很简单
class node{
public var $per;
public var $lNode;
public var $rNode;
function test1(){
}
function test2(){
}
}由于php是弱类型语言，你只要清楚$lNode和$rNode的类型是node,赋值时一定要把node类型的左右节点赋给对应的就可以了。
$node0=new node();
$node0->per = 49;
$node1=new node();
$node1->per = 20;
$node2=new node();
$node2->per = 29;
$node0->lNode = $node1;
$node0->rNode = $node2;
------解决方案--------------------
这样写
<br /><?php<br />$s = '4 6 8 9 10 12';<br />foreach(explode(' ', $s) as $k=>$v) { //初始化<br /> $t[] = array('w' => $v, 'v' => $v); //用值作为权重<br />}<br />HuffmanTree($t);<br />echo DLR($t), PHP_EOL;<br /><br />/* 哈夫曼算法 */<br />function HuffmanTree(&$F) {<br /> while(count($F) > 1) {<br /> $r = array();<br /> foreach($F as $item) $r[] = $item['w'];<br /> array_multisort($r, $F);<br /> $t = array('w' => $F[0]['w']+$F[1]['w'], 'l' => $F[0], 'r' => $F[1]);<br /> unset($F[0]);<br /> unset($F[1]);<br /> $F[] = $t;<br /> }<br /> $F = current($F);<br />}<br />/* 前序遍历 */<br />function DLR($F, $deep=0) {<br /> echo str_repeat(" ", $deep) .'+- ' . $F['w'] . PHP_EOL;//打印权重<br /> if(isset($F['l'])) DLR($F['l'], $deep+1);<br /> if(isset($F['r'])) DLR($F['r'], $deep+1);<br />}<br /></pre><br><br>+- 49<br> +- 20<br> +- 10<br> +- 10<br> +- 4<br> +- 6<br> +- 29<br> +- 12<br> +- 17<br> +- 8<br> +- 9<br><br><div class="clear"></div> </div> <div class="artmoreart "> <div class="artdp artptit"><span></span> <p>相关文章</p> </div> <div class="artmores flexColumn"> <a class="artmrlis flexRow" href="/faq/613516.html" title="如何从PHP中调用Python文件？"><b></b> <p class="overflowclass">如何从PHP中调用Python文件？</p> </a> <a class="artmrlis flexRow" href="/faq/613300.html" title="我们如何使用使用mysql_fetch_assoc()函数的PHP脚本来显示MySQL表中的所有记录？"><b></b> <p class="overflowclass">我们如何使用使用mysql_fetch_assoc()函数的PHP脚本来显示MySQL表中的所有记录？</p> </a> <a class="artmrlis flexRow" href="/faq/613204.html" title="ini_set()在PHP中的作用是什么？"><b></b> <p class="overflowclass">ini_set()在PHP中的作用是什么？</p> </a> <a class="artmrlis flexRow" href="/faq/613132.html" title="在PHP中的readlink()函数"><b></b> <p 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