#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/stat.h>

int main (int argc, char **argv) {

 DIR * thisdir = opendir (".");
 struct dirent *entry;
 while ((entry = readdir (thisdir)) != NULL) {
  struct stat st;
  char *dir;
  lstat (entry->d_name,&st); //file status info associated with the name
  if (S_ISDIR (st.st_mode)) dir = "yes"; //is this file a directory?
  else dir = "no";
//readdir gets the next filename out of the directory.
  printf ("%s\t%s\n",entry->d_name,dir);
 }
}

//The chdir system call changes your current working directory