int main()
{
	string foldername;
	cout << "Enter folder name." << endl;
	cin >> foldername;
	int fileindex = 0;
	string filenamestring, tempstring;

	WIN32_FIND_DATA findfiledata;
	HANDLE hFind, hFile;
	foldername += "\\*.*";
	hFind = FindFirstFile(foldername.c_str(), &findfiledata);

	if(hFind != INVALID_HANDLE_VALUE)
	{
		tempstring = findfiledata.cFileName;
		tempstring.erase(0,tempstring.find("."));
		filenamestring = '0' + tempstring;
		hFile = CreateFile(findfiledata.cFileName,
        GENERIC_ALL,
        0,
        NULL,
        OPEN_EXISTING,
        FILE_ATTRIBUTE_NORMAL,
        NULL);
		SetFileShortName(hFile, filenamestring.c_str());

		while (FindNextFile(hFind, &findfiledata) != 0) 
		{
			++fileindex;
			tempstring = findfiledata.cFileName;
			tempstring.erase(0,tempstring.find("."));
			filenamestring = inttostring(fileindex) + tempstring;
			hFile = CreateFile(findfiledata.cFileName,
			GENERIC_ALL,
			0,
			NULL,
			OPEN_EXISTING,
			FILE_ATTRIBUTE_NORMAL,
			NULL);

			SetFileShortName(hFile, filenamestring.c_str());
		}
	}
	CloseHandle(hFile);
	FindClose(hFind);

	return 0;
}