Write a C program to print all files and folders

A file is a collection of records (or) a place on a hard disk where data is permanently stored.

By using C commands, we can access files in different ways.

File operations

The following are the file operations that can be performed in the C programming language:

• Name the file
• Open the file
• Read from the file
• Write to the file
• Close the file

Syntax

The syntax for opening and naming a file is as follows:

FILE *File pointer;

For example, FILE * fptr;

File pointer = fopen (“File name”, “mode”);

For example, fptr = fopen("sample.txt", "r");

FILE *fp;
fp = fopen (“sample.txt”, “w”);

The syntax for reading a file is as follows −

int fgetc( FILE * fp );// read a single character from a file

The syntax for writing files is as follows−

int fputc( int c, FILE *fp ); // write individual characters to a stream

The logic that we use to display the files and folders in current directory, where the program saved is explained below −

dr = opendir(".");
if(dr!=NULL){
   printf("List of Files & Folders:-</p><p>");
   for(d=readdir(dr); d!=NULL; d=readdir(dr)){
      printf("%s</p><p>", d->d_name);
   }
   closedir(dr);
}

Example

Following is the C program for printing the files and folders in a directory −

#include<stdio.h>
#include<conio.h>
#include<dirent.h>
int main() {
   struct dirent *d;
   DIR *dr;
   dr = opendir(".");
   if(dr!=NULL) {
      printf("List of Files & Folders:-</p><p>");
      for(d=readdir(dr); d!=NULL; d=readdir(dr)) {
         printf("%s</p><p>", d->d_name);
      }
      closedir(dr);
   }
   else
   printf("</p><p>error while opening the directory!");
   getch();
   return 0;
}

Output

When the above program is executed, it produces the following output:

List of Files & Folders:-
.
..
accessing array.c
accessing array.exe
accessing array.o
bhanu.txt
C Programs
convert 2 digit no into english word.c
convert 2 digit no into english word.exe
convert 2 digit no into english word.o
DATA
delete vowels in string.c
delete vowels in string.exe
delete vowels in string.o
emp.txt
EVEN
ex.c
ex.exe
ex.o
example pro.c
example pro.exe
example pro.o
fibbinoci serie.c
fibbinoci serie.exe
fibbinoci serie.o
file
file example1.c
file example1.exe
file example1.o
file example2.c
file example2.exe
file example2.o
implicit conversion.c
implicit conversion.exe
implicit conversion.o
leap year.c
leap year.exe
leap year.o
little n big endian.c
little n big endian.exe
little n big endian.o
work out examples

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