Learn-c-by-examples-simple-linked-list-program-in-c

Cの単純なリンクリストプログラム

実装

このアルゴリズムの実装は以下のとおりです-

#include <stdio.h>
#include <stdlib.h>

struct node {
   int data;
   struct node *next;
};

struct node *head = NULL;
struct node *current = NULL;

//display the list
void printList() {

   struct node *ptr = head;

   printf("\n[head] =>");
  //start from the beginning
   while(ptr != NULL) {
      printf(" %d =>",ptr->data);
      ptr = ptr->next;
   }

   printf(" [null]\n");
}

//insert link at the first location
void insert(int data) {
  //create a link
   struct node *link = (struct node*) malloc(sizeof(struct node));

  //link->key = key;
   link->data = data;

  //point it to old first node
   link->next = head;

  //point first to new first node
   head = link;
}

int main() {
   insert(10);
   insert(20);
   insert(30);
   insert(1);
   insert(40);
   insert(56);

   printList();
   return 0;
}

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出力

プログラムの出力は次のようになります-

[head] => 56 => 40 => 1 => 30 => 20 => 10 => [null]

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