#include <iostream>
#include <string>
#include <sys/types.h>
#include <dirent.h>

using namespace std;

int main (int argc, char * argv[]) {
     string dirname;
     DIR * dirhandle;
     dirent *  entry;

     if (argc == 1) {
         dirname = ".";
     } else {
        dirname = argv[1];
     }

     cout << "Opening " << dirname << endl;

     dirhandle = opendir(dirname.c_str());
     if (NULL == dirhandle) {
        cout << "Could not open " << dirname << endl;
        return(-1);
     } 


     cout << "The files are: " << endl;
     while ( (entry = readdir(dirhandle)) != NULL) {
         cout << "     " << entry->d_name << endl; 
     }

     closedir(dirhandle);
}