{"id":609,"date":"2023-02-20T07:02:52","date_gmt":"2022-08-17T15:12:42","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/%e3%83%aa%e3%83%b3%e3%82%af%e3%83%aa%e3%82%b9%e3%83%88%e3%81%ae%e9%95%b7%e3%81%95%e3%82%92%e8%a6%8b%e3%81%a4%e3%81%91%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e3%81%82%e3%82%8a%e3%81%be%e3%81%99%e3%81%8b\/"},"modified":"2025-08-01T01:03:11","modified_gmt":"2025-07-31T16:03:11","slug":"%e3%83%aa%e3%83%b3%e3%82%af%e3%83%aa%e3%82%b9%e3%83%88%e3%81%ae%e9%95%b7%e3%81%95%e3%82%92%e8%a6%8b%e3%81%a4%e3%81%91%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e3%81%82%e3%82%8a%e3%81%be%e3%81%99%e3%81%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%e3%83%aa%e3%83%b3%e3%82%af%e3%83%aa%e3%82%b9%e3%83%88%e3%81%ae%e9%95%b7%e3%81%95%e3%82%92%e8%a6%8b%e3%81%a4%e3%81%91%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e3%81%82%e3%82%8a%e3%81%be%e3%81%99%e3%81%8b\/","title":{"rendered":"\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u306e\u9577\u3055\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u3059\u304b\uff1f"},"content":{"rendered":"<h2>\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f (Linkurisuto to wa nan desu ka?)<\/h2>\n<ul class=\"post-ul\">\n<li>A linked list is a linear data structure used for storing collections of data<\/li>\n<li>Successive elements are connected by pointers<\/li>\n<li>The last element points to NULL<\/li>\n<li>Each element is a separate object and is called a Node<\/li>\n<li>Each node in a linked list comprises of two partsData<br \/>\nReference to Next Node<\/li>\n<\/ul>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65649697daa94e2bdf7bfcce\/2-0.jpg\" alt=\"Node\" \/><\/div>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65649697daa94e2bdf7bfcce\/3-0.jpg\" alt=\"Linked List\" \/><\/div>\n<h2>\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u306e\u9577\u3055\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u306f\uff1f<\/h2>\n<p>\u9023\u7d50\u30ea\u30b9\u30c8\u306e\u9577\u3055\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u306f2\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u53cd\u5fa9\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u518d\u5e30\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1<\/ol>\n<h2>\u30a4\u30c6\u30ec\u30fc\u30bf\u30fc\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u4f7f\u7528\u3057\u3066\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u306e\u9577\u3055\u3092\u6c42\u3081\u308b\u3002<\/h2>\n<p>\u79c1\u305f\u3061\u306f\u9023\u7d50\u30ea\u30b9\u30c8\u306e\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3001\u9023\u7d50\u30ea\u30b9\u30c8\u306e\u9577\u3055\u3092\u898b\u3064\u3051\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li>Head Points to the First Node of The List.<\/li>\n<li>Initialize the count variable with value 0<\/li>\n<li>Initialize the temp variable with Head<\/li>\n<li>As we access each Node, the value of count variable is increased by 1.<\/li>\n<li>Stop The process when we reach null.<\/li>\n<li>Do not change the head reference.<\/li>\n<\/ul>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65649697daa94e2bdf7bfcce\/10-0.jpg\" alt=\"Iterative Approach for LinkedList Length\" \/><\/div>\n<h3>Java\u3067\u306e\u30b3\u30fc\u30c9<\/h3>\n<pre class=\"post-pre\"><code>package com.scdev.ds;\r\n\r\npublic class MyLinkedList {\r\n\r\n\tpublic class Node {\r\n\r\n\t\tint data;\r\n\r\n\t\tNode next;\r\n\r\n\t}\r\n\r\n\tpublic Node head;\r\n\tpublic Node tail;\r\n\tpublic int size;\r\n\r\n\tpublic int getFirst() throws Exception {\r\n\r\n\t\tif (this.size == 0) {\r\n\r\n\t\t\tthrow new Exception(\"linked list is empty\");\r\n\t\t}\r\n\r\n\t\treturn this.head.data;\r\n\t}\r\n\r\n\tpublic int getLast() throws Exception {\r\n\r\n\t\tif (this.size == 0) {\r\n\r\n\t\t\tthrow new Exception(\"linked list is empty\");\r\n\t\t}\r\n\t\treturn this.tail.data;\r\n\t}\r\n\r\n\tpublic void display() {\r\n\r\n\t\tNode temp = this.head;\r\n\t\twhile (temp != null) {\r\n\t\t\tSystem.out.println(temp.data + \" \");\r\n\t\t\ttemp = temp.next;\r\n\t\t}\r\n\t}\r\n\r\n\tpublic void addFirst(int item) {\r\n\r\n\t\tNode nn = new Node();\r\n\r\n\t\tnn.data = item;\r\n\t\tif (this.size == 0) {\r\n\t\t\tthis.head = nn;\r\n\t\t\tthis.tail = nn;\r\n\t\t\tthis.size = this.size + 1;\r\n\r\n\t\t} else {\r\n\r\n\t\t\tnn.next = this.head;\r\n\r\n\t\t\tthis.head = nn;\r\n\r\n\t\t\tthis.size = this.size + 1;\r\n\r\n\t\t}\r\n\r\n\t}\r\n\r\n\tpublic int length() {\r\n\r\n\t\tNode temp = this.head;\r\n\t\tint count = 0;\r\n\t\twhile (temp != null) {\r\n\t\t\tcount++;\r\n\t\t\ttemp = temp.next;\r\n\t\t}\r\n\t\treturn count;\r\n\t}\r\n\r\n\tpublic static void main(String[] args) {\r\n\r\n\t\tMyLinkedList ll = new MyLinkedList();\r\n\r\n\t\tll.addFirst(10);\r\n\r\n\t\tll.addFirst(20);\r\n\r\n\t\tll.addFirst(30);\r\n\r\n\t\tll.addFirst(40);\r\n\r\n\t\tll.addFirst(50);\r\n\r\n\t\tSystem.out.println(\"Length of Linked List is \" + ll.length());\r\n\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>C\u8a00\u8a9e\u3067\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0<\/h3>\n<pre class=\"post-pre\"><code>#include &lt;stdio.h&gt;\r\n\r\n#include &lt;stdlib.h&gt;\r\n\r\n\/* A structure of linked list node *\/\r\n\r\nstruct node {\r\n\r\n  int data;\r\n\r\n  struct node *next;\r\n\r\n} *head;\r\n\r\nvoid initialize(){\r\n\r\n    head = NULL;\r\n\r\n}\r\n\r\n\/*\r\n\r\nInserts a node in front of a singly linked list.\r\n\r\n*\/\r\n\r\nvoid insert(int num) {\r\n\r\n    \/* Create a new Linked List node *\/\r\n\r\n    struct node* newNode = (struct node*) malloc(sizeof(struct node));\r\n\r\n    newNode-&gt;data  = num;\r\n\r\n    \/* Next pointer of new node will point to head node of linked list  *\/\r\n\r\n    newNode-&gt;next = head;\r\n\r\n    \/* make new node as the new head of linked list *\/\r\n\r\n    head = newNode;\r\n\r\n    printf(\"Inserted Element : %d\\n\", num);\r\n\r\n}\r\n\r\nint getLength(struct node *head){\r\n\r\n    int length =0;\r\n\r\n    while(head != NULL){\r\n\r\n        head = head-&gt;next;\r\n\r\n        length++;\r\n\r\n    }\r\n\r\n    return length;\r\n\r\n}\r\n\r\n\/*\r\n\r\nPrints a linked list from head node till the tail node\r\n\r\n*\/\r\n\r\nvoid printLinkedList(struct node *nodePtr) {\r\n\r\n  while (nodePtr != NULL) {\r\n\r\n     printf(\"%d\", nodePtr-&gt;data);\r\n\r\n     nodePtr = nodePtr-&gt;next;\r\n\r\n     if(nodePtr != NULL)\r\n\r\n         printf(\"--&gt;\");\r\n\r\n  }\r\n\r\n}\r\n\r\nint main() {\r\n\r\n    initialize();\r\n\r\n    \/* Creating a linked List*\/\r\n\r\n    insert(8); \r\n\r\n    insert(3);\r\n\r\n    insert(2);\r\n\r\n    insert(7);\r\n\r\n    insert(9);\r\n\r\n    printf(\"\\nLinked List\\n\");\r\n\r\n    printLinkedList(head);\r\n\r\n    printf(\"\\nLinked List Length : %d\", getLength(head));\r\n\r\n    return 0;\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u51fa\u529b<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65649697daa94e2bdf7bfcce\/16-0.png\" alt=\"Iterative Solution Output\" \/><\/div>\n<hr \/>\n<h2>\u518d\u5e30\u7684\u306a\u89e3\u6cd5\u3092\u4f7f\u3063\u3066\u3001\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u306e\u9577\u3055\u3092\u6c42\u3081\u308b\u65b9\u6cd5<\/h2>\n<p>\u30d9\u30fc\u30b9\u30b1\u30fc\u30b9\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>Last Node points to Null value<\/li>\n<li>Return 0<\/li>\n<\/ul>\n<p>\u518d\u5e30\u7684\u306a\u5834\u5408\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>At each step update the Value of Current Node to the Next Node<\/li>\n<li>Call= 1+fun(curr.next)<\/li>\n<\/ul>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65649697daa94e2bdf7bfcce\/23-0.jpg\" alt=\"Recursive Solution\" \/><\/div>\n<p>\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u306b\u306fLL1\u3001LL2\u3001LL3\u306e3\u3064\u306e\u8981\u7d20\u304c\u3042\u308a\u307e\u3059\u3002\u518d\u5e30\u547c\u3073\u51fa\u3057\u304c\u884c\u308f\u308c\u308b\u969b\u306b\u30e1\u30e2\u30ea\u30b9\u30bf\u30c3\u30af\u3067\u4f55\u304c\u8d77\u3053\u308b\u304b\u3092\u89b3\u5bdf\u3057\u307e\u3059\u3002\u30e1\u30e2\u30ea\u30b9\u30bf\u30c3\u30af\uff1a<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65649697daa94e2bdf7bfcce\/25-0.jpg\" alt=\"Memory Stack\" \/><\/div>\n<p>\u4e3b\u306a\u6a5f\u80fd\u306fLL1\u3092\u547c\u3073\u51fa\u3057\u3001LL1\u306fLL2\u3092\u547c\u3073\u51fa\u3057\u3001LL2\u306fLL3\u3092\u547c\u3073\u51fa\u3057\u3001LL3\u306fnull\u5024\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u3002null\u5024\u306b\u5230\u9054\u3057\u305f\u305f\u3081\u3001\u3053\u3053\u304b\u3089\u623b\u308a\u307e\u3059\u30020\u306fLL3\u306b\u8fd4\u3055\u308c\u3001LL3\u306f1\u3092LL2\u306b\u8fd4\u3057\u3001LL2\u306f2\u3092LL1\u306b\u8fd4\u3057\u307e\u3059\u3002LL1\u306f\u6700\u7d42\u7684\u306b3\u3092\u4e3b\u306a\u6a5f\u80fd\u306b\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<h3>Java\u3067\u306e\u30b3\u30fc\u30c9<\/h3>\n<pre class=\"post-pre\"><code>package com.scdev.ds;\r\n\r\npublic class MyLinkedList {\r\n\r\n    public class Node {\r\n\r\n         int data;\r\n\r\n         Node next;\r\n\r\n    }\r\n\r\n    public Node head;\r\n\r\n    public Node tail;\r\n\r\n    public int size;\r\n\r\n    public int getfirst() throws Exception {\r\n\r\n         if (this.size == 0) {\r\n\r\n             throw new Exception(\"linked list is empty\");\r\n\r\n         }\r\n\r\n         return this.head.data;\r\n\r\n    }\r\n\r\n    public int RemoveFirst() throws Exception {\r\n\r\n         if (this.size == 0) {\r\n\r\n             throw new Exception(\"LL is empty\");\r\n\r\n         }\r\n\r\n         Node temp = this.head;\r\n\r\n         if (this.size == 1) {\r\n\r\n             this.head = null;\r\n\r\n             this.tail = null;\r\n\r\n             size = 0;\r\n\r\n         } else {\r\n\r\n             this.head = this.head.next;\r\n\r\n             this.size--;\r\n\r\n         }\r\n\r\n         return temp.data;\r\n\r\n    }\r\n\r\n    public void addFirst(int item) {\r\n\r\n         Node nn = new Node();\r\n\r\n         nn.data = item;\r\n\r\n         if (this.size == 0) {\r\n\r\n             this.head = nn;\r\n\r\n             this.tail = nn;\r\n\r\n             this.size = this.size + 1;\r\n\r\n         } else {\r\n\r\n             nn.next = this.head;\r\n\r\n             this.head = nn;\r\n\r\n             this.size = this.size + 1;\r\n\r\n         }\r\n\r\n    }\r\n\r\n    public int lengthUsingRecursiveApproach (){\r\n\r\n         return lengthUsingRecursiveApproach(this.head);\r\n\r\n    }\r\n\r\n    private int lengthUsingRecursiveApproach(Node curr) {\r\n\r\n         \/\/ TODO Auto-generated method stub\r\n\r\n         if (curr == null) {\r\n\r\n             return 0;\r\n\r\n         }\r\n\r\n         return 1 + lengthUsingRecursiveApproach (curr.next);\r\n\r\n    }\r\n\r\n\r\n\r\n\r\n    public static void main(String[] args) {\r\n\r\n         MyLinkedList ll = new MyLinkedList();\r\n\r\n         \/\/ insert elements into the Linked List\r\n\r\n        ll.addFirst(10);\r\n\r\n         ll.addFirst(20);\r\n\r\n         ll.addFirst(30);\r\n\r\n         ll.addFirst(40);\r\n\r\n         ll.addFirst(50);\r\n\r\n         \/\/ Length of List\r\n\r\n         System.out.println(\"Recursive Approach length \" + ll.lengthUsingRecursiveApproach(ll.head));\r\n\r\n    }\r\n\r\n}\r\n<\/code><\/pre>\n<h3>C\u8a00\u8a9e\u3092\u4f7f\u3063\u305f\u30b3\u30fc\u30c9<\/h3>\n<pre class=\"post-pre\"><code>#include &lt;stdio.h&gt;\r\n\r\nstruct Node\r\n\r\n{\r\n\r\n    int data;\r\n\r\n    struct Node* next;\r\n\r\n};\r\nvoid push(struct Node** head_ref, int new_data)\r\n{\r\n\r\n    struct Node* new_node =  (struct Node*) malloc(sizeof(struct Node));  \r\n\r\n    new_node-&gt;data  = new_data;  \r\n\r\n    \/* link the old list of the new node *\/\r\n\r\n    new_node-&gt;next = (*head_ref);\r\n\r\n    (*head_ref)    = new_node;\r\n\r\n}\r\n\r\nint getCount(struct Node* head)\r\n\r\n{\r\n\r\n    \/\/ Base case\r\n\r\n    if (head == NULL)\r\n\r\n        return 0; \r\n\r\n    return 1 + getCount(head-&gt;next);\r\n\r\n}\r\n\r\nint main()\r\n\r\n{\r\n\r\n    struct Node* head = NULL;\r\n\r\n    push(&amp;head, 1);\r\n\r\n    push(&amp;head, 3);\r\n\r\n    push(&amp;head, 1);\r\n\r\n    push(&amp;head, 2);\r\n\r\n    push(&amp;head, 1);\r\n\r\n    printf(\"count of nodes is %d\", getCount(head));\r\n\r\n    return 0;\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u51fa\u529b\u3059\u308b<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65649697daa94e2bdf7bfcce\/32-0.png\" alt=\"Recursive Solution Output\" \/><\/div>\n<h2>\u6642\u9593\u306e\u8907\u96d1\u3055<\/h2>\n<p>\u518d\u5e30\u7684\u306a\u89e3\u6cd5\u3068\u7e70\u308a\u8fd4\u3057\u7684\u306a\u89e3\u6cd5\u306e\u4e21\u65b9\u3067O(N)\u3067\u3059\u3002\u9577\u3055\u3092\u77e5\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u306e\u306f\u3001\u5358\u4e00\u306e\u30c8\u30e9\u30d0\u30fc\u30b9\u3060\u3051\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f (Linkurisuto to wa nan desu ka?) A linked list is a linear data structure used for storing colle [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-609","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u306e\u9577\u3055\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u3059\u304b\uff1f - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u306e\u9577\u3055\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u3059\u304b\uff1f\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u306e\u9577\u3055\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u3059\u304b\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u306e\u9577\u3055\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u3059\u304b\uff1f\" \/>\n<meta property=\"og:description\" content=\"\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u306e\u9577\u3055\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u3059\u304b\uff1f\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u306e\u9577\u3055\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u3059\u304b\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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