{"id":597,"date":"2015-10-14T11:44:23","date_gmt":"2015-10-14T03:44:23","guid":{"rendered":"http:\/\/www.zyuns.com\/?p=597"},"modified":"2015-10-14T11:44:23","modified_gmt":"2015-10-14T03:44:23","slug":"php%e5%b8%b8%e7%94%a8%e7%9a%84%e5%9b%9b%e7%a7%8d%e6%8e%92%e5%ba%8f%e7%ae%97%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.siediyer.cn\/?p=597","title":{"rendered":"php\u5e38\u7528\u7684\u56db\u79cd\u6392\u5e8f\u7b97\u6cd5"},"content":{"rendered":"

1.\u63d2\u5165\u6392\u5e8f<\/strong><\/p>\n

\u601d\u60f3\uff1a<\/strong><\/p>\n

\u6bcf\u6b21\u5c06\u4e00\u4e2a\u5f85\u6392\u5e8f\u7684\u6570\u636e\u5143\u7d20\u63d2\u5165\u5230\u524d\u9762\u5df2\u7ecf\u6392\u597d\u5e8f\u7684\u6570\u5217\u4e2d\uff0c\u4f7f\u6570\u5217\u4f9d\u7136\u6709\u5e8f\uff0c\u77e5\u9053\u5f85\u6392\u5e8f\u6570\u636e\u5143\u7d20\u5168\u90e8\u63d2\u5165\u5b8c\u4e3a\u6b62\u3002<\/p>\n

\u793a\u4f8b\uff1a<\/strong><\/p>\n

[\u521d\u59cb\u5173\u952e\u5b57] [49] 38 65 97 76 13 27 49
\nJ=2(38) [38 49] 65 97 76 13 27 49
\nJ=3(65) [38 49 65] 97 76 13 27 49
\nJ=4(97) [38 49 65 97] 76 13 27 49
\nJ=5(76) [38 49 65 76 97] 13 27 49
\nJ=6(13) [13 38 49 65 76 97] 27 49
\nJ=7(27) [13 27 38 49 65 76 97] 49
\nJ=8(49) [13 27 38 49 49 65 76 97]<\/p>\n

\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong><\/p>\n

\u5982\u679c\u76ee\u6807\u662f\u628an\u4e2a\u5143\u7d20\u7684\u5e8f\u5217\u5347\u5e8f\u6392\u5217\uff0c\u90a3\u4e48\u91c7\u7528\u63d2\u5165\u6392\u5e8f\u5b58\u5728\u6700\u597d\u60c5\u51b5\u548c\u6700\u574f\u60c5\u51b5\u3002\u6700\u597d\u60c5\u51b5\u5c31\u662f\uff0c\u5e8f\u5217\u5df2\u7ecf\u662f\u5347\u5e8f\u6392\u5217\u4e86\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u8fdb\u884c\u7684\u6bd4\u8f83\u64cd\u4f5c\u9700(n-1)\u6b21\u5373\u53ef\u3002\u6700\u574f\u60c5\u51b5\u5c31\u662f\uff0c\u5e8f\u5217\u662f\u964d\u5e8f\u6392\u5217\uff0c\u90a3\u4e48\u6b64\u65f6\u9700\u8981\u8fdb\u884c\u7684\u6bd4\u8f83\u5171\u6709n(n-1)\/2\u6b21\u3002\u63d2\u5165\u6392\u5e8f\u7684\u8d4b\u503c\u64cd\u4f5c\u662f\u6bd4\u8f83\u64cd\u4f5c\u7684\u6b21\u6570\u52a0\u4e0a (n-1)\u6b21\u3002\u5e73\u5747\u6765\u8bf4\u63d2\u5165\u6392\u5e8f\u7b97\u6cd5\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n^2)\u3002\u56e0\u800c\uff0c\u63d2\u5165\u6392\u5e8f\u4e0d\u9002\u5408\u5bf9\u4e8e\u6570\u636e\u91cf\u6bd4\u8f83\u5927\u7684\u6392\u5e8f\u5e94\u7528\u3002\u4f46\u662f\uff0c\u5982\u679c\u9700\u8981\u6392\u5e8f\u7684\u6570\u636e\u91cf\u5f88\u5c0f\uff0c\u4f8b\u5982\uff0c\u91cf\u7ea7\u5c0f\u4e8e\u5343\uff0c\u90a3\u4e48\u63d2\u5165\u6392\u5e8f\u8fd8\u662f\u4e00\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\u3002<\/p>\n

\u4ee3\u7801\uff1a<\/strong><\/p>\n

function insert_sort($arr){   \r\n    $count = count($arr);   \r\n    for($i=1; $i<$count; $i++){   \r\n        $tmp = $arr[$i];   \r\n        $j = $i - 1;   \r\n        while($arr[$j] > $tmp){   \r\n            $arr[$j+1] = $arr[$j];   \r\n            $arr[$j] = $tmp;   \r\n            $j--;   \r\n         }   \r\n     }   \r\n    return $arr;   \r\n}<\/pre>\n
2.\u9009\u62e9\u6392\u5e8f<\/strong><\/p>\n
\u601d\u60f3<\/strong>\uff1a\u6bcf\u4e00\u8d9f\u4ece\u5f85\u6392\u5e8f\u7684\u6570\u636e\u5143\u7d20\u4e2d\u9009\u51fa\u6700\u5c0f\uff08\u6216\u6700\u5927\uff09\u7684\u4e00\u4e2a\u5143\u7d20\uff0c\u987a\u5e8f\u653e\u5728\u5df2\u6392\u597d\u5e8f\u7684\u6570\u5217\u7684\u6700\u540e\uff0c\u76f4\u5230\u5168\u90e8\u5f85\u6392\u5e8f\u7684\u6570\u636e\u5143\u7d20\u6392\u5b8c\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/strong><\/p>\n
[\u521d\u59cb\u5173\u952e\u5b57] [49 38 65 97 76 13 27 49]
\n\u7b2c\u4e00\u8d9f\u6392\u5e8f\u540e 13 \uff3b38 65 97 76 49 27 49]
\n\u7b2c\u4e8c\u8d9f\u6392\u5e8f\u540e 13 27 \uff3b65 97 76 49 38 49]
\n\u7b2c\u4e09\u8d9f\u6392\u5e8f\u540e 13 27 38 [97 76 49 65 49]
\n\u7b2c\u56db\u8d9f\u6392\u5e8f\u540e 13 27 38 49 [49 97 65 76]
\n\u7b2c\u4e94\u8d9f\u6392\u5e8f\u540e 13 27 38 49 49 [97 97 76]
\n\u7b2c\u516d\u8d9f\u6392\u5e8f\u540e 13 27 38 49 49 76 [76 97]
\n\u7b2c\u4e03\u8d9f\u6392\u5e8f\u540e 13 27 38 49 49 76 76 [ 97]
\n\u6700\u540e\u6392\u5e8f\u7ed3\u679c 13 27 38 49 49 76 76 97<\/p>\n
\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong><\/p>\n
\u65f6\u95f4\u590d\u6742\u5ea6\u4e3ao(n2),\u4e0d\u7a33\u5b9a\u6392\u5e8f\uff0c\u9002\u5408\u89c4\u6a21\u6bd4\u8f83\u5c0f\u7684<\/p>\n
\u4ee3\u7801\uff1a<\/strong><\/p>\n
\/\/\u9009\u62e9\u6392\u5e8f\uff08\u4e00\u7ef4\u6570\u7ec4\uff09   \r\nfunction select_sort($arr){   \r\n    $count = count($arr);   \r\n    for($i=0; $i<$count; $i++){   \r\n        $k = $i;   \r\n        for($j=$i+1; $j<$count; $j++){   \r\n            if ($arr[$k] > $arr[$j])   \r\n                $k = $j;   \r\n            if ($k != $i){   \r\n                $tmp = $arr[$i];   \r\n                $arr[$i] = $arr[$k];   \r\n                $arr[$k] = $tmp;   \r\n             }   \r\n         }   \r\n     }   \r\n    return $arr;   \r\n}<\/pre>\n
3.\u5192\u6ce1\u6392\u5e8f<\/strong><\/p>\n
\u601d\u60f3\uff1a<\/strong><\/p>\n
\u4e24\u4e24\u6bd4\u8f83\u5f85\u6392\u5e8f\u6570\u636e\u5143\u7d20\u7684\u5927\u5c0f\uff0c\u53d1\u73b0\u4e24\u4e2a\u6570\u636e\u5143\u7d20\u7684\u6b21\u5e8f\u76f8\u53cd\u65f6\u5373\u8fdb\u884c\u4ea4\u6362\uff0c\u76f4\u5230\u6ca1\u6709\u53cd\u5e8f\u7684\u6570\u636e\u5143\u7d20\u4e3a\u6b62\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/strong><\/p>\n
 <\/p>\n
49 13 13 13 13 13 13 13
\n38 49 27 27 27 27 27 27
\n65 38 49 38 38 38 38 38
\n97 65 38 49 49 49 49 49
\n76 97 65 49 49 49 49 49
\n13 76 97 65 65 65 65 65
\n27 27 76 97 76 76 76 76
\n49 49 49 76 97 97 97 97<\/p>\n
\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong><\/p>\n
\u8be5\u7b97\u6cd5\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n2<\/sup>)\u3002\u4f46\u662f\uff0c\u5f53\u539f\u59cb\u5173\u952e\u5b57\u5e8f\u5217\u5df2\u6709\u5e8f\u65f6\uff0c\u53ea\u8fdb\u884c\u4e00\u8d9f\u6bd4\u8f83\u5c31\u7ed3\u675f\uff0c\u6b64\u65f6\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n)\u3002<\/p>\n
\u4ee3\u7801\uff1a<\/strong><\/p>\n
\/\/\u5192\u6ce1\u6392\u5e8f\uff08\u4e00\u7ef4\u6570\u7ec4\uff09   \r\nfunction bubble_sort($array){   \r\n    $count = count($array);   \r\n    if ($count <= 0) return false;   \r\n    for($i=0; $i<$count; $i++){   \r\n        for($j=$count-1; $j>$i; $j--){   \r\n            if ($array[$j] < $array[$j-1]){   \r\n                $tmp = $array[$j];   \r\n                $array[$j] = $array[$j-1];   \r\n                $array[$j-1] = $tmp;   \r\n             }   \r\n         }   \r\n     }   \r\n    return $array;   \r\n}<\/pre>\n
4.\u5feb\u901f\u6392\u5e8f<\/strong><\/p>\n
\u601d\u60f3\uff1a<\/strong><\/p>\n
\u901a\u8fc7\u4e00\u8d9f\u6392\u5e8f\u5c06\u8981\u6392\u5e8f\u7684\u6570\u636e\u5206\u5272\u6210\u72ec\u7acb\u7684\u4e24\u90e8\u5206\uff0c\u5176\u4e2d\u4e00\u90e8\u5206\u7684\u6240\u6709\u6570\u636e\u90fd\u6bd4\u53e6\u5916\u4e00\u90e8\u5206\u7684\u6240\u6709\u6570\u636e\u90fd\u8981\u5c0f\uff0c\u7136\u540e\u518d\u6309\u6b64\u65b9\u6cd5\u5bf9\u8fd9\u4e24\u90e8\u5206\u6570\u636e\u5206\u522b\u8fdb\u884c\u5feb\u901f\u6392\u5e8f\uff0c\u6574\u4e2a\u6392\u5e8f\u8fc7\u7a0b\u53ef\u4ee5\u9012\u5f52\u8fdb\u884c\uff0c\u4ee5\u6b64\u8fbe\u5230\u6574\u4e2a\u6570\u636e\u53d8\u6210\u6709\u5e8f\u5e8f\u5217\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/strong><\/p>\n
 <\/p>\n
\u521d\u59cb\u5173\u952e\u5b57 \uff3b49 38 65 97 76 13 27 49\uff3d
\n\u4e00\u8d9f\u6392\u5e8f\u4e4b\u540e \uff3b27 38 13\uff3d 49 \uff3b76 97 65 49\uff3d
\n\u4e8c\u8d9f\u6392\u5e8f\u4e4b\u540e \uff3b13\uff3d 27 \uff3b38\uff3d 49 \uff3b49 65\uff3d76 \uff3b97\uff3d
\n\u4e09\u8d9f\u6392\u5e8f\u4e4b\u540e 13 27 38 49 49 \uff3b65\uff3d76 97
\n\u6700\u540e\u7684\u6392\u5e8f\u7ed3\u679c 13 27 38 49 49 65 76 97<\/p>\n
\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong><\/p>\n
\u5feb\u901f\u6392\u5e8f\u4e3b\u4f53\u7b97\u6cd5\u65f6\u95f4\u8fd0\u7b97\u91cf\u7ea6 O(log2n) \uff0c\u5212\u5206\u5b50\u533a\u51fd\u6570\u8fd0\u7b97\u91cf\u7ea6 O(n) \uff0c\u6240\u4ee5\u603b\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(nlog2n) \uff0c\u5b83\u663e\u7136\u4f18\u4e8e\u5192\u6ce1\u6392\u5e8f O(n2). \u53ef\u662f\u7b97\u6cd5\u7684\u4f18\u52bf\u5e76\u4e0d\u662f\u7edd\u5bf9\u7684\u3002\u8bd5\u5206\u6790\uff0c\u5f53\u539f\u6587\u4ef6\u5173\u952e\u5b57\u6709\u5e8f\u65f6\uff0c\u5feb\u901f\u6392\u5e8f\u65f6\u95f4\u590d\u6742\u5ea6\u662f O(n2), \u8fd9\u79cd\u60c5\u51b5\u4e0b\u5feb\u901f\u6392\u5e8f\u4e0d\u5feb\u3002\u800c\u8fd9\u79cd\u60c5\u51b5\u7684\u5192\u6ce1\u6392\u5e8f\u662f O(n), \u53cd\u800c\u5f88\u5feb\u3002\u5728\u539f\u6587\u4ef6\u8bb0\u5f55\u5173\u952e\u5b57\u65e0\u5e8f\u65f6\u7684\u591a\u79cd\u6392\u5e8f\u65b9\u6cd5\u4e2d\uff0c\u5feb\u901f\u6392\u5e8f\u88ab\u8ba4\u4e3a\u662f\u6700\u597d\u7684\u4e00\u79cd\u6392\u5e8f\u65b9\u6cd5\u3002<\/p>\n
\u4ee3\u7801\uff1a<\/strong><\/p>\n
function quick_sort($array){   \r\n  if (count($array) <= 1) return $array;    \r\n  \r\n  $key = $array[0];   \r\n  $left_arr = array();   \r\n  $right_arr = array();   \r\n  for ($i=1; $i<count($array); $i++){   \r\n    if ($array[$i] <= $key)   \r\n      $left_arr[] = $array[$i];   \r\n    else  \r\n      $right_arr[] = $array[$i];   \r\n  }   \r\n  $left_arr = quick_sort($left_arr);   \r\n  $right_arr = quick_sort($right_arr);    \r\n  \r\n  return array_merge($left_arr, array($key), $right_arr);   \r\n}<\/pre>\n
\u51e0\u79cd\u6392\u5e8f\u7b97\u6cd5\u7684\u6bd4\u8f83\u548c\u9009\u62e9
\n1. \u9009\u53d6\u6392\u5e8f\u65b9\u6cd5\u9700\u8981\u8003\u8651\u7684\u56e0\u7d20\uff1a
\n(1) \u5f85\u6392\u5e8f\u7684\u5143\u7d20\u6570\u76een\uff1b
\n(2) \u5143\u7d20\u672c\u8eab\u4fe1\u606f\u91cf\u7684\u5927\u5c0f\uff1b
\n(3) \u5173\u952e\u5b57\u7684\u7ed3\u6784\u53ca\u5176\u5206\u5e03\u60c5\u51b5\uff1b
\n(4) \u8bed\u8a00\u5de5\u5177\u7684\u6761\u4ef6\uff0c\u8f85\u52a9\u7a7a\u95f4\u7684\u5927\u5c0f\u7b49\u3002
\n2. \u5c0f\u7ed3\uff1a
\n(1) \u82e5n\u8f83\u5c0f(n <= 50)\uff0c\u5219\u53ef\u4ee5\u91c7\u7528\u76f4\u63a5\u63d2\u5165\u6392\u5e8f\u6216\u76f4\u63a5\u9009\u62e9\u6392\u5e8f\u3002\u7531\u4e8e\u76f4\u63a5\u63d2\u5165\u6392\u5e8f\u6240\u9700\u7684\u8bb0\u5f55\u79fb\u52a8\u64cd\u4f5c\u8f83\u76f4\u63a5\u9009\u62e9\u6392\u5e8f\u591a\uff0c\u56e0\u800c\u5f53\u8bb0\u5f55\u672c\u8eab\u4fe1\u606f\u91cf\u8f83\u5927\u65f6\uff0c\u7528\u76f4\u63a5\u9009\u62e9\u6392\u5e8f\u8f83\u597d\u3002
\n(2) \u82e5\u6587\u4ef6\u7684\u521d\u59cb\u72b6\u6001\u5df2\u6309\u5173\u952e\u5b57\u57fa\u672c\u6709\u5e8f\uff0c\u5219\u9009\u7528\u76f4\u63a5\u63d2\u5165\u6216\u5192\u6ce1\u6392\u5e8f\u4e3a\u5b9c\u3002
\n(3) \u82e5n\u8f83\u5927\uff0c\u5219\u5e94\u91c7\u7528\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(nlog2n)\u7684\u6392\u5e8f\u65b9\u6cd5\uff1a\u5feb\u901f\u6392\u5e8f\u3001\u5806\u6392\u5e8f\u6216\u5f52\u5e76\u6392\u5e8f\u3002 \u5feb\u901f\u6392\u5e8f\u662f\u76ee\u524d\u57fa\u4e8e\u6bd4\u8f83\u7684\u5185\u90e8\u6392\u5e8f\u6cd5\u4e2d\u88ab\u8ba4\u4e3a\u662f\u6700\u597d\u7684\u65b9\u6cd5\u3002
\n(4) \u5728\u57fa\u4e8e\u6bd4\u8f83\u6392\u5e8f\u65b9\u6cd5\u4e2d\uff0c\u6bcf\u6b21\u6bd4\u8f83\u4e24\u4e2a\u5173\u952e\u5b57\u7684\u5927\u5c0f\u4e4b\u540e\uff0c\u4ec5\u4ec5\u51fa\u73b0\u4e24\u79cd\u53ef\u80fd\u7684\u8f6c\u79fb\uff0c\u56e0\u6b64\u53ef\u4ee5\u7528\u4e00\u68f5\u4e8c\u53c9\u6811\u6765\u63cf\u8ff0\u6bd4\u8f83\u5224\u5b9a\u8fc7\u7a0b\uff0c\u7531\u6b64\u53ef\u4ee5\u8bc1\u660e\uff1a\u5f53\u6587\u4ef6\u7684n\u4e2a\u5173\u952e\u5b57\u968f\u673a\u5206\u5e03\u65f6\uff0c\u4efb\u4f55\u501f\u52a9\u4e8e”\u6bd4\u8f83”\u7684\u6392\u5e8f\u7b97\u6cd5\uff0c\u81f3\u5c11\u9700\u8981O(nlog2n)\u7684\u65f6\u95f4\u3002
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