C Program to Create and Display Linked List

Linked List is a dynamic data structure whose length can be changed (increased or decreased) at run time. Linked list located at random memory location. To create a linked list, malloc must be used for dynamic memory allocation and struct keyword to create data structure ( Such as Node). Node is a one kind of data structure which has two parts. One is data or information(such as array) and another is reference or link(such as pointer). In a singly linked list, first node known as Head and last node known as Tail. Reference part of a tail node must be NULL for singly linked list.

Contents

• 1. Code to create linked list.
• 2. Code to display linked list.
• 3.Source code to create and display linked list.
• 4. Download source code for linked list.

C programming code to create and display singly linked list:

1. Code to Create Linked List:

struct node
{
    int data;
    struct node *next;
}*head=NULL, *last;
/*Node (above code) must be define after the heading and before the main function) */

struct node *new_node;
    char ch;
    do
    {
        new_node=(struct node *)malloc(sizeof(struct node));
        printf("\n Enter the data:");
        scanf("%d",&new_node->data);
        new_node->next=NULL;
        if(head==NULL)
        {
            head=new_node;
            last=new_node;
        }
        else
        {
            last->next=new_node;
            last=new_node;
        }
        fflush(stdin); /*You may use it to remove flush effect if any*/
        printf("\n To create again press any key, if not press Space.\n");
        ch=getch();
    }
    while(ch!=32);// 32 use for Space

2. Code to Display Linked List:

struct node *temp;
    if(head==NULL)
        printf("\n Linked List is empty.");
    else
    {
        printf("\n\t Linked List:\n\t-------------\n\n");
        temp=head;
        while(temp!=NULL)
        {
            printf("\t=>\t%d\n",temp->data);
            temp=temp->next;
        }
    }

3. Source Code to Create and Display Linked List:

//Code by ismail@programmer.net
#include
#include
#define Esc 27
struct node
{
    int data;
    struct node *next;
}*head=NULL,*last;
void create();
//------------------------------------
int main()
{
    char ch;
    while(1)
    {
        printf("\n\n          <@> Main Menu <@>\n          ******************\n");
        printf("\n\t1.Create Linked List\n\t2.Display.\n\tPress ESC to Exit\n");
        printf("\n Please choose, what kind of work you want to do?");
        ch=getch();
		switch(ch)
        {
        case '1':
            create();
            break;
        case '2':
            display();
            break;
        case Esc:
            exit(1);
            return 0;
        default:
            printf("\n\n Invalid Input/ choice.");
        }
    }
    return 0;
}
//-------------------------------------------------
void create()/*Function to create a node or insert a node at last */
{
    struct node *new_node;
    char ch;
    do
    {
        new_node=(struct node *)malloc(sizeof(struct node));
        printf("\n Enter the data:");
        scanf("%d",&new_node->data);
        new_node->next=NULL;
        if(head==NULL)
        {
            head=new_node;
            last=new_node;
        }
        else
        {
            last->next=new_node;
            last=new_node;
        }
        fflush(stdin); /*You may use it to remove flush effect if any*/
        printf("\n To create again press any key, if not press Space.\n");
        ch=getch();
    }
    while(ch!=32);// 32 use for Space
}
//---------------------------------------------
void display()
{
    struct node *temp;
    if(head==NULL)
        printf("\n Linked List is empty.");
    else
    {
        printf("\n\t Linked List:\n\t-------------\n\n");
        temp=head;
        while(temp!=NULL)
        {
            printf("\t=>\t%d\n",temp->data);
            temp=temp->next;
        }
    }
}

4. Download Source Code for Linke List

Download source code to create and display singly linked list from below link:
Download source code to create and display linked list

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