Files and Folders using Data structure.

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<conio.h>
#include<dir.h>
#include<dos.h>


struct node
{
 char *name;   /* used to get file / folder name. */
 int attrib;   /* used to get it's attribute.  */
 struct node *next;  /* concept of Linked list */
};
void main()
{
 struct node *head,*head1;
 struct node *list,*list1;
 struct node * place(struct ffblk ff,struct node *first,int don);
 void display(struct node *first);
 void print(struct node *list,int *i);
 int i,c,c1,done,done1;
 struct ffblk f,f1;
 head=NULL;
 head1=NULL;
 clrscr();
 done=findfirst("*.*",&f,FA_DIREC|FA_RDONLY|FA_HIDDEN|FA_SYSTEM|FA_ARCH);
 /* struct variable "f" contains all files and folders information */
 done1=findfirst("*.*",&f1,FA_RDONLY|FA_HIDDEN|FA_SYSTEM|FA_ARCH);
 /* struct variable "f1" contains all files information */
 head=place(f,head,done);  /* content of f is placed in struct head */
 display(head);
 /*
  Note : f contains name of files and folders with their attributes
  in f.ff_name, f.ff_attrib which is assigned to name, attrib in
  the struct node
 */
 printf("
*************************************************
");
 getch();
 head1=place(f1,head1,done1); /* content of f1 is placed in struct head1
*/
 display(head1);
 /*
  Note : f1 contains name of files and folders with their attributes
  in f1.ff_name, f1.ff_attrib which is assigned to name, attrib in
  the struct node
 */
 printf("
*************************************************

");
 getch();
 i=0;
 c1=0;
 /*
  Here, head and head1 are compared so that we could extract only
  the folders.
 */
 list=head;   /* head is assigned to list */
 while(list!=NULL)
 {
   list1=head1;  /* head1 is assigned to list1 */
   if(list1==NULL)   /* if there are 0 files */
    print(list,&i);   /* then display content of list */
   else
   {
    while(list1!=NULL)
    {
    if(strcmp(list->name,list1->name)==0)  /* compare list and list1 */
     c1=1;
    list1=list1->next;
    }
    if(c1==0)      /* if folder found both in list and list1*/
     print(list,&i);  /* then display content of list */
   }
   c1=0;
   list=list->next;
  }
 printf("
         FOLDERS = %d",i);
 printf("
*************************************************
");
 printf("
        Where,");
 printf("
            H - Hidden");
 printf("
            D - Directory");
 printf("
            R - Read only");
 printf("
            S - System");
 printf("
            A - Archive");
 getch();
 free(list1);
 free(list);
 free(head);
 free(head1);
}

void print(struct node *list,int *i)
{
 void property(struct node *list);
 /* to display folders other than default folders (. and ..)  */
 if((strcmp(list->name,"."))!=0 && (strcmp(list->name,".."))!=0)
 {
  *i=*i+1;     /* counts number of folders */
  property(list);
  printf(" %s
",list->name);
 }
}

void property(struct node *list)
{    /* finds their attribute */
  if(list->attrib & FA_HIDDEN)
   printf("(H)");
  if(list->attrib & FA_DIREC)
   printf("(D)");
  if(list->attrib & FA_RDONLY)
   printf("(R)");
  if(list->attrib & FA_SYSTEM)
   printf("(S)");
  if(list->attrib & FA_ARCH)
   printf("(A)");
}

struct node * place(struct ffblk ff,struct node *first,int don)
{
 static int j;
 void create(struct node *first,char *ch,int d);
 void insert(struct node *first,char *ch,int d);
 int i=0,c=0;
 char *p;
 if(don!=0)
  first=NULL;
 else
 {
 while(don==0)
 {
  if(i==0)
  {
   first=(struct node *)malloc(sizeof(struct node));
   if ((p = (char *) malloc(14)) == NULL)
    exit(1);
   strcpy(p,ff.ff_name);
   create(first,p,ff.ff_attrib);
   i=1;
  }
  else
  {
   if ((p = (char *) malloc(14)) == NULL)
    exit(1);
   strcpy(p,ff.ff_name);
   insert(first,p,ff.ff_attrib);
  }
  don=findnext(&ff);
  c=c+1;
 }
 }
 if(j==0)
 {
 printf("
*************************************************
");
 printf("
         %d FILES & FOLDERS

",c);
 j+=1;
 }
 else
 printf("
         %d FILES

",c);
 return(first);
}

void create(struct node *first,char *ch,int d)
{
 char *p;
 if ((p = (char *) malloc(sizeof(ch))) == NULL)
  exit(1);
 p=ch;
 first->name=p;
 first->attrib=d;
 first->next=NULL;
 return;
}

void insert(struct node *first,char *ch,int d)
{
 struct node *temp,*list;
 char *p;
 list=first;
 while(list->next!=NULL)
  list=list->next;
 if ((p = (char *)malloc(sizeof(ch))) == NULL)
  exit(1);
 p=ch;
 temp=(struct node *)malloc(sizeof(struct node));
 temp->name=p;
 temp->attrib=d;
 temp->next=NULL;
 list->next=temp;
 return;
}

void display(struct node *first)
{
 struct node *list;
 void property(struct node *list);
 list=first;
 if(list==NULL)
  printf("
NULL");
 else
 {
 while(list->next!=NULL)
 {
  property(list);
  printf("%s %d
",list->name,list->attrib);
  list=list->next;
 }
  property(list);
  printf("%s %d
",list->name,list->attrib);
 }
 return;
}