C Program to list all files and sub-directories in a directory

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#include <stdio.h>
#include <dirent.h>
  
int main(void)
{
    struct dirent *de;  // Pointer for directory entry
  
    // opendir() returns a pointer of DIR type. 
    DIR *dr = opendir(".");
  
    if (dr == NULL)  // opendir returns NULL if couldn't open directory
    {
        printf("Could not open current directory" );
        return 0;
    }
  
    // Refer http://pubs.opengroup.org/onlinepubs/7990989775/xsh/readdir.html
    // for readdir()
    while ((de = readdir(dr)) != NULL)
            printf("%s\n", de->d_name);
  
    closedir(dr);    
    return 0;
}

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Output: 


              All files and subdirectories 
              of current directory  




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