PHP實現雙向鏈表、棧,c語言實現雙向鏈表
前期寫過一個PHP實現單向鏈表、實現排序單向鏈表的一篇文章,傳送門:http://www.cnblogs.com/yydcdut/p/3777760.html。雙向鏈表寫過了,再拿出來提一提:http://www.cnblogs.com/yydcdut/p/3782661.html。
這次再來分享一下實現雙向鏈表和棧的實現。代碼雖然是以前寫的了,但是發現PHP寫的這些代碼很容易看懂!
雙向鏈表
php //雙向鏈表 class Hero { public $pre=null;//前指標 public $no;//排名 public $name;//名字 public $next=null;//後指標 /** *建構函式,申明鏈表頭 */ public function __construct($no='',$name='') { $this->no=$no; $this->name=$name; } /** *插入 */ static public function addHero($head,$hero) { $cur = $head; $isExist=false; //判斷目前這個鏈表是否為空白 if($cur->next==null) { $cur->next=$hero; $hero->pre=$cur; } else { //如果不是空節點,則安排名來添加 //找到添加的位置 while($cur->next!=null) { if($cur->next->no > $hero->no) {//如果大於了排名,跳出 break; } else if($cur->next->no == $hero->no) {//如果等於排名,則代表有這個元素了 $isExist=true; echo "
不能添加相同的編號"; } $cur=$cur->next; } if(!$isExist) {//如果元素不存在,執行插入操作 if($cur->next!=null) {$hero->next=$cur->next;} $hero->pre=$cur; if($cur->next!=null) {$hero->next->pre=$hero;} $cur->next=$hero; } } } //遍曆 static public function showHero($head) { $cur=$head; while($cur->next!=null) { echo "
編號:".$cur->next->no."名字:".$cur->next->name; $cur=$cur->next; } } static public function delHero($head,$herono) { $cur=$head; $isFind=false; while($cur!=null) { if($cur->no==$herono) { $isFind=true; break; } //繼續找 $cur=$cur->next; } if($isFind) { if($cur->next!=null) {$cur->next_pre=$cur->pre;} $cur->pre->next=$cur->next; } else {echo "
沒有找到目標";} } } $head = new Hero(); $hero1 = new Hero(1,'1111'); $hero3 = new Hero(3,'3333'); $hero2 = new Hero(2,'2222'); Hero::addHero($head,$hero1); Hero::addHero($head,$hero3); Hero::addHero($head,$hero2); Hero::showHero($head); Hero::delHero($head,2); Hero::showHero($head);?>
雙向鏈表的插入操作:
if($cur->next!=null) $hero->next=$cur->next;$hero->pre=$cur; if($cur->next!=null) $hero->next->pre=$hero;$cur->next=$hero;
if($cur->next!=null) $cur->next->pre=$cur->pre;$cur->pre->next=$cur->next;
棧
php class myStack { private $top=-1; private $maxSize=5; private $stack=array(); public function push($val) { if($this->top == $this->maxSize) { echo "
已經滿了"; } $this->top++; $this->stack[$this->top]=$val; } public function showStack() { if($this->top==-1) { echo "
棧為空白!"; return ; } for($i=$this->top;$i>-1;$i--) { echo "
stack[".$i."]=".$this->stack[$i]; } } public function pop() { if($this->top==-1) { echo "
棧為空白!"; return ; } $val=$this->stack[$this->top]; $this->top--; echo "
彈出".$val; } } $mystack = new myStack; $mystack->push('111'); $mystack->push('222'); $mystack->showStack(); $mystack->pop(); $mystack->pop();?>
我是天王蓋地虎的分割線
《PHP實現鏈表》傳送門:http://www.cnblogs.com/yydcdut/p/3777760.html
轉載請註明出處:轉載請註明出處:http://www.cnblogs.com/yydcdut
java 中用雙向鏈表類比棧
裡只實現了Stack部分功能
public class Stack{
private Node top;
public Stack(){
this.top = null;
}
public void push(Node node){
if(node == null)
return;
if(this.top == null){
this.top = node;
node.setNext(null);
node.setPre(null);
}
else{
this.top.setNext(node);
node.setPre(this.top);
node.setNext(null);
this.top = node;
}
}
public Node pop(){
if(this.top == null)
return null;
Node curr = this.top;
Node pre = curr.getPre();
pre.setNext(null);
this.top = pre;
return curr;
}
public Node top(){
return this.top;
}
public boolean isEmpty(){
return this.top == null ? true : false;
}
public void empty(){
this.top = null;
}
public static void main(String[] args){
Stack stack = new Stack();
Node n1 = new Node(1);
Node n2 = new Node(2);
Node n3 = new Node(3);
System.out.println(stack.isEmpty());
stack.push(n1);
System.out.println(stack.top().getValue());
stack.push(n2);
stack.push(n3);
System.out.println(stack.pop().getValue());
stack.empty();
}
}
class Node {
private int value;
private Node next;
private Node pre;
public Node(int value, Node next, Node pre){
this.value = value;
this.next = next;
this.pre = pre;
}
public Node(int value){
this.value = value;
this.next = null;
this.pre = null;
}
public int getValue() {
return value;
}
public void setValue(int value) {
this.value = value;
}
public Node getNext() {
return next;
}
public void setNext(Node next) {
this.next = next;
}
public Node getPre() {
return pre;
}
public void setPre(Node pre) {
this.pre = pre;
}
}
用鏈表實現堆棧或隊列是什
堆棧或隊列資料都需要種容器來盛放
比用內建數組來實現隊列
int a[100];
入隊操作樣實現:已有元素全部移位新元素插入
(當實現效率比較低)
容器選擇鏈表則入隊操作樣實現:
構造鏈節點(C結構體)要入隊元素填入新節點再利用鏈表插入操作新節點插入鏈表
所用鏈表實現堆棧或隊列盛放資料容器選作鏈表利用鏈表插入節點、刪除節點來實現堆棧、隊列相應操作
比用鏈表實現隊列C寫下幾函數
//入隊
void insert(指向隊列(鏈表)指標待入隊元素);
//出隊
void delete(指向隊列(鏈表)指標);
http://www.bkjia.com/PHPjc/827942.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/827942.htmlTechArticlePHP實現雙向鏈表、棧,c語言實現雙向鏈表 前期寫過一個PHP實現單向鏈表、實現排序單向鏈表的一篇文章,傳送門: http://www.cnblogs.com/yydc...