输入一个字符串,按字典序打印出该字符串中字符的所有排列。例如输入字符串abc,则打印出由字符a,b,c所能排列出来的所有字符串abc,acb,bac,bca,cab和cba。 结果请按字母顺序输出。
3条回答 默认 最新
- pharaoh_shi 2017-02-25 03:09关注
<?php $str = "acdakjflsdaf"; $data = randStr($str); var_dump($data); function randStr($str) { $temp[] = $str; $n = strlen($str); for ($i = 0; $i < $n; $i++) { // 把第一个移动到最后一个 $fir_char = $str{0}; $str = substr($str, 1); $str .= $fir_char; $temp[] = $str; } sort($temp); return $temp; }
输出结果:
---------- Debug PHP ---------- array(13) { [0] => string(12) "acdakjflsdaf" [1] => string(12) "acdakjflsdaf" [2] => string(12) "afacdakjflsd" [3] => string(12) "akjflsdafacd" [4] => string(12) "cdakjflsdafa" [5] => string(12) "dafacdakjfls" [6] => string(12) "dakjflsdafac" [7] => string(12) "facdakjflsda" [8] => string(12) "flsdafacdakj" [9] => string(12) "jflsdafacdak" [10] => string(12) "kjflsdafacda" [11] => string(12) "lsdafacdakjf" [12] => string(12) "sdafacdakjfl" } 输出完成 (耗时 0 秒) - 正常终止
你看是否符合你的要求~~~
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