<?php function quicksort($str){ if(count($str)<=1) return $str;//如果个数不大于一,直接返回 $key=$str[0];//取一个值,稍后用来比较; $left_arr=array(); $right_arr=array(); for($i=1;$i<count($str);$i++){//比$key大的放在右边,小的放在左边; if($str[$i]
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