#include <stdio.h>
     #include <sys/types.h>
     #include <dirent.h>
     
     int
     main (void)
     {
       DIR *dp;
       struct dirent *ep;
     
       dp = opendir ("./");
       if (dp != NULL)
         {
           while (ep = readdir (dp))
             puts (ep->d_name);
           (void) closedir (dp);
         }
       else
         perror ("Couldn't open the directory");
     
       return 0;
     }