This is a simple demonstration of a singly linked list, from my class work:#include <stdio.h>#include <stdlib.h>#include <wctype.h>#include <errno.h>#include <assert.h>#include <ctype.h>#include <stddef.h>#include <wchar.h>#include <locale.h>#include <setjmp.h>struct node{    int          info;    struct node *link;};typedef struct node* NODE;NODE main(){    NODE first = NULL;    int  item, choice;    for(;;)    {        printf(1.INSERT AT FRONT\n2.DISPLAY\n3.QUIT\n\nPLEASE ENTER YOUR CHOICE:);        scanf(%d,&choice);        switch (choice)        {            case 1:            printf(\nEnter the item to be inserted:);            scanf(%d, &item);            first = insert_front(item,first);            break;            case 2:            display(first);            break;            case 3:            exit(0);        }    }}NODE getnode(){    NODE x;    x = (NODE) malloc(sizeof(struct node));    if(x == NULL)    {        printf(Out of memory);        exit(0);    }    return x;}int insert_front(int item, NODE first){    NODE temp;    temp = getnode();    temp->info = item;    temp->link = first;    return temp;}void display(NODE first){    NODE temp;    if(first == NULL)    {        printf(Empty);        return;    }    printf(\nThe contents are: );    temp = first;    while(temp != NULL)    {        printf(%d , temp->info);        temp = temp->link;    }    printf(\n);}As you can see, this code demonstrates the working of a linked list. How can this program more smaller, better, more professional and much more good? If you were given a chance to modify this program, how would you do it? I wanna know how to think and how to train myself to modify programs like these. And as you see, I have learned most of C. I referred to and learned C from K.N Kings The C programming language: A modern approach and Computer science: A structured approach using C and data structures from Data structures using C by Tenenbaum.Now I have stretched my legs in learning C what can I do to create application that might be useful to me or to others. Say I want to create a small game like snake or create a small application that my father might use to do his business.
Demonstration of a singly linked list
c;linked list