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1£¬Êý¾Ý¿â½á¹¹¼òµ¥£¬Ö»ÓÐ cid parentid name Èý¸ö×ֶΣ¬ÎÞÈκÎÈßÓà×Ö¶Î
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CREATE DATABASE `sortclass`DEFAULT CHARSET utf8;
CREATE TABLE IF NOT EXISTS `class` (
`cid` mediumint(8) unsigned NOT NULL auto_increment,
`pid` mediumint(8) unsigned NOT NULL,
`cname` varchar(50) NOT NULL,
PRIMARY KEY (`cid`),
KEY `pid` (`pid`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
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<?php
header("Content-type: text/html; charset=utf-8");
//Á¬½ÓÊý¾Ý¿â
$link = mysql_connect('localhost','root','eric') or die(mysql_error());
mysql_select_db('sortclass',$link);
//ÎÞÏÞ·ÖÀàÀà¿â
class SortClass{
var $data = array();
var $child = array(-1=>array());
var $layer = array(-1=>-1);
var $parent = array();
var $link;
var $table;
function SortClass($link, $table){
$this->setNode(0, -1, '¶¥¼«½Úµã');
$this->link = $link;
$this->table = $table;
$node = array();
$results = mysql_query('select * from '.$this->table.'',$this->link);
while($node = mysql_fetch_assoc($results)){
$this->setNode($node['cid'],$node['pid'],$node['cname']);
}
}
function setNode ($id, $parent, $value){
$parent = $parent?$parent:0;
$this->data[$id] = $value;
$this->child[$id] = array();
$this->child[$parent][] = $id;
$this->parent[$id] = $parent;
$this->layer[$id] = !isset($this->layer[$parent])? 0 : $this->layer[$parent] + 1;
}
function getList (&$tree, $root= 0){
foreach ($this->child[$root] as $key=>$id){
$tree[] = $id;
if ($this->child[$id]) $this->getList($tree, $id);
}
}
function getValue ($id){return $this->d


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<?php
//--------------------
// »ù±¾Êý¾Ý½á¹¹
//--------------------
//¶þ·Ö²éÕÒ£¨Êý×éÀï²éÕÒij¸öÔªËØ£©
function bin_sch($arr, $low, $high, $k) {
if($low<=$high) {
$mid = intval(($low+$high)/2);
if($arr[$mid] == $k) {
return $mid;
} elseif($k<$ ......

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//ðÅÝÅÅÐò£¨Êý×éÖÐʵÏÖ£©
function bubble_sort($arr) {
$cnt = count($arr);
if($cnt<=0) return false;
for($i=0; $i<$cnt;$i++) {
for($j=$cnt-1; $j>$i;$j--) {
if($arr[$j]<$arr[$j-1]) {
$tmp = $arr[$j];
$arr[$j] = $arr[$j ......
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