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Write a C program to print all files and folders.
File is a collection of records (or) a place on hard disk where the data is stored permanently.
By using C commands, we can access the files in different ways.
Operations on files
Given below are the operations which can be performed on files in the C programming language −
- Naming the file
- Opening the file
- Reading from the file
- Writing into the file
- Closing the file
Syntax
The syntax for opening and naming a file respectively is given below −
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 from file is as follows −
int fgetc( FILE * fp );// read a single character from a file
The syntax for writing into file 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:-
");
for(d=readdir(dr); d!=NULL; d=readdir(dr)){
printf("%s
", 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:-
");
for(d=readdir(dr); d!=NULL; d=readdir(dr)) {
printf("%s
", d->d_name);
}
closedir(dr);
}
else
printf("
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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