labelname=oneFacePath+".txt";

ifstream f(labelname);
cout<< labelname<<":"<<f.good()<<endl;

#include <boost/algorithm/string.hpp>     // logging module
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>
using namespace boost::algorithm;
std
 
::getline(f, line);
split(tokens, line, is_any_of(" ")); // here it is


std::string::size_type pos_space;
pos_space=line.rfind(" ");
string class_label=line.substr(line.length()-pos_space-1);