绗竴绉嶆晥鐜囦綆浣嗘渶绠鍗曟渶瀹规槗鐞嗚В锛岀浜屼釜鏄畻娉曞璁轰笂鎻愪緵鐨勫崟鍚戜竴娆￠亶鍘嗘壘涓兼柟娉曪紝绗笁绉嶆槸鍙屽悜閬嶅巻鎵句腑鍊肩粡鍏稿揩鎺掔畻娉曘備笁缁勭畻娉曞疄鐜板拰姣旇緝濡備笅锛氭柟娉曚竴锛氳鏂规硶姣旇緝鐩磋锛屼絾鎹熷け浜嗗ぇ閲忕殑绌洪棿涓轰唬浠凤紝浣跨敤浜嗘晥鐜囪緝浣庣殑merge鍑芥暟銆傚湪涓夌鏂规硶涓晥鐜囨渶浣庛傛渶鍧忔儏鍐典笅绠楁硶閫鍖栦负(O(n*n))
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<code>function quick_sort($array) {
if(count($array) <= 1) return $array;
$key = $array[0];
$rightArray = array();
$leftArray = array();
for($i = 1; $i < count($array); $i++) {
if($array[$i] >= $key) {
$rightArray[] = $array[$i];
} else {
$leftArray[] = $array[$i];
}
}
$leftArray = quick_sort($leftArray);
$rightArray = quick_sort($rightArray);
return array_merge($leftArray, array($key), $rightArray);
}
</code>
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鏂规硶浜岋細璇ョ畻娉曟潵鑷畻娉曞璁猴紝鍙綔Nico Lomuto鏂规硶锛堟劅鍏磋叮goole涓婃湁璇︾粏璇存槑锛変娇鐢ㄦ渶缁忓吀鐨勫崟鏂瑰悜涓娆￠亶鍘嗘壘鍒颁腑鍊笺備絾杩欑绠楁硶鍦ㄦ渶鍧忔儏鍐典笅锛堜緥濡傚肩浉鍚岀殑鏁扮粍锛岄渶瑕乶-1娆″垝鍒嗭紝姣忎竴娆″垝鍒嗛渶瑕丱(n) 鏃堕棿鍘绘帀涓涓厓绱狅級鏈鍧忔儏鍐典笅涓篛(n*n)
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<code>function quick_sort(&$array, $start, $end) {
if ($start >= $end) return;
$mid = $start;
for ($i = $start + 1; $i <= $end; $i++) {
if ($array[$i] < $array[$mid]) {
$mid++;
$tmp = $array[$i];
$array[$i] = $array[$mid];
$array[$mid] = $tmp;
}
}
$tmp = $array[$start];
$array[$start] = $array[$mid];
$array[$mid] = $tmp;
quick_sort($array, $start, $mid - 1);
quick_sort($array, $mid + 1, $end);
}
</code>
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鏂规硶涓夛細璇ユ柟娉曞熀鏈笂鏄暀绉戜功寮忕殑甯歌鍐欐硶锛岄鍏堜粠宸﹀悜鍙抽亶鍘嗗皬浜庝腑闂村厓绱犵殑璺宠繃锛屽悓鏃朵粠鍙冲悜宸﹂亶鍘嗛亣鍒板ぇ鐨勫厓绱犺烦杩囷紝鐒跺悗
濡傛灉娌℃湁浜ゅ弶鐫浜ゆ崲涓よ竟鍊硷紝缁х画寰幆锛岀洿鍒版壘鍒颁腑闂寸偣銆傛敞鎰忚鏂规硶鍦ㄥ鐞嗙浉鍚屽厓绱犵殑鏃跺欙紝浠嶆棫浜ゆ崲锛岃繖鏍峰湪鏈鍧忔儏鍐典笅涔熸湁O(nlogn)
鏁堢巼銆備絾涓嬮潰鐨勫嚱鏁颁腑锛屽鏋滃皢$array[$right] > $key 鏀规垚 $array[$right] >=$key 鎴栧皢 $array[$left] < $key鏀规垚$array[$left] <= $key鍒欐渶鍧
鎯呭喌涓嶄絾浼氬爼钀戒负O(n*n).鑰屼笖闄や簡姣忔姣旇緝鐨勬秷鑰楀锛岃繕浼氫骇鐢焠娆′氦浜掔殑棰濆寮閿銆傝棰樿繕鏈夊彟澶栦袱涓冪偣锛岄拡瀵规璁扮‖鑳岀殑鍚屽锛
1锛氫腑闂寸殑涓や釜while鍙惁浜掓崲銆傚綋鐒朵笉鑳戒簰鎹紝鍥犱负瀵逛簬蹇洏闇瑕佷竴涓澶栫殑绌洪棿淇濆瓨鍒濆鐨勫乏鍊硷紝杩欐牱宸﹀彸浜掓崲鐨勬椂鍊欙紝鍏堢敤鍙宠竟瑕嗙洊宸茬粡淇濆瓨
涓轰腑鍊肩殑宸﹀硷紝鍚﹀垯浼氬嚭鐜伴棶棰樸傝杩欏彞$array[$left] = $array[$right];
2锛$array[$right] = $key; 璇ヨ鍙ュ惈涔夊彲鍚︾渷鐣ャ傝鍙ヤ笉鑳界渷鐣ワ紝澶у鍙互鑰冭檻涓涓瀬绔儏鍐垫瘮濡備袱涓肩殑鎺掑簭锛5,2锛夛紝閫愭鐪嬩笅灏辨槑鐧戒簡銆
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<code>function quick_sort_swap(&$array, $start, $end) {
if($end <= $start) return;
$key = $array[$start];
$left = $start;
$right = $end;
while($left < $right) {
while($left < $right && $array[$right] > $key)
$right--;
$array[$left] = $array[$right];
while($left < $right && $array[$left] < $key)
$left++;
$array[$right] = $array[$left];
}
$array[$right] = $key;
quick_sort_swap(&$array, $start, $right - 1);
quick_sort_swap(&$array, $right+1, $end);
}
</code>
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娉細鍏充簬php蹇熸帓搴忕殑涓夌鐢ㄦ硶鐨勫唴瀹瑰氨鍏堜粙缁嶅埌杩欓噷锛屾洿澶氱浉鍏虫枃绔犵殑鍙互鐣欐剰
浠ヤ笂灏辨槸php蹇熸帓搴忕殑涓夌鐢ㄦ硶鐨勮缁嗗唴瀹癸紝鏇村淇℃伅璇峰叧娉∣D浜戝叾瀹冪浉鍏虫枃绔狅紒
鍠 娆 58