Files and Folders using Data structure. - Data Structures Source Code in C++

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Home » C++ Home » Data Structures Home » Files and Folders using Data structure.

A D V E R T I S E M E N T

Title	Files and Folders using Data structure.
Author	Meenakshisundaram.M
Author Email	sundaram_80 [at] yahoo.com
Description	Hi, This is my attempt to use Data structure concept(linked list through pointers) to interact with files and folders. This program uses simple concepts in C for storing and displaying all files and folders from the current directory. Note : " struct ffblk " is a predefined structure that enables u to view files and folders from your current directory. Hope, you may get something useful from this program(especially in how to assign pointer variables).
Category	C++ » Data Structures
Hits	386198
Code	Select and Copy the Code
#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; }

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