How to use the “ . " and " .. " to judge an empty folder？

#include<io.h>
#include<iostream>
#include<string>
#include<fstream>
using namespace std;
void dfsFolder(string folderPath, ofstream &fout)
{
    _finddata_t FileInfo;
    string strfind = folderPath + "\\*";
    long Handle = _findfirst(strfind.c_str(), &FileInfo);

    if (Handle == -1L)
    {
        cerr << "can not match the folder path" << endl;
        exit(-1);
    }
    do{

        if (FileInfo.attrib & _A_SUBDIR)
        {

            if( (strcmp(FileInfo.name,".") != 0 ) &&(strcmp(FileInfo.name,"..") != 0))   //this sentence!//
            {
                string newPath = folderPath + "\\" + FileInfo.name;
                dfsFolder(newPath, fout);
            }
        }
        else  
        {
            fout << folderPath << "\\" << FileInfo.name  << " ";
        }
    }while (_findnext(Handle, &FileInfo) == 0);

    _findclose(Handle);
    fout.close();
}