php实现循环链表
Posted 王大西
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<?php /** * php实现链表 * Date: 2018/5/18 * Time: 下午5:59 */ class Node { public $nodeId = 0; public $left = 0; public $right = 0; public function __construct($nodeId, $left, $right) { $this->nodeId = $nodeId; $this->left = $left; $this->right = $right; } } class ListArr { private $list = null; public function construct() { } //创造一个n长度链表 public function createList($n) { if ($n <= 0) { return false; } for ($i = 0; $i < $n; $i++) { if ($i == 0) { $node = new Node(0, $n - 1, 1); } elseif ($i == $n - 1) { $node = new Node($n - 1, $n - 2, 0); } else { $node = new Node($i, $i - 1, $i + 1); } $this->list[$i] = $node; } } //遍历链表 public function iteratorList() { $total = count($this->list); //链表长度 $strRet = ‘‘; for ($i = 0; $i < $total; $i++) { $node = $this->list[$i]; echo "current node : {$node->left}->{$node->nodeId}->{$node->right}\n"; } echo $strRet; } //查找某一节点 public function findNode($n) { if ($n < 0 ) { return false; } $total = count($this->list); if ($n > $total) { $n = $n % $total; $node = $this->list[$n - 1]; } else { $node = $this->list[$n - 1]; } echo "current Node is {$node->nodeId} left is {$node->left} right is {$node->right}\n"; } } $list = new ListArr(); $list->createList(5); $list->findNode(3); $list->findNode(6); $list->iteratorList();
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