#include <algorithm>

 #include <iostream>

 #include <iomanip>

 #include <cstring>

 #include <climits>

 #include <complex>

 #include <fstream>

 #include <cassert>

 #include <cstdio>

 #include <bitset>

 #include <vector>

 #include <deque>

 #include <queue>

 #include <stack>

 #include <ctime>

 #include <set>

 #include <map>

 #include <cmath>

 #include <opencv.hpp>

 #include <opencv2/opencv.hpp>

 #include <opencv2/ml/ml.hpp>

 #include <opencv2/core/core.hpp>

 #include <opencv_modules.hpp>

 #include <opencv2/highgui/highgui.hpp>

 #include <opencv2/imgproc/imgproc.hpp>

 #define cvQueryHistValue_1D( hist, idx0 ) \

     ((float)cvGetReal1D( (hist)->bins, (idx0)))

 using namespace std;

 using namespace cv;

 const string rootDir("./sample/");

 const string jpg(".jpg");

 const string dirNames[] = {

     rootDir + "0/", rootDir + "1/", rootDir + "2/",

     rootDir + "3/", rootDir + "4/", rootDir + "5/",

     rootDir + "6/", rootDir + "7/", rootDir + "8/",

     rootDir + "9/"

 };

 inline void i2s(string& str, int i, int len = ) {

     stringstream ss;

     ss << setw(len) << setfill('') << i;

     str = ss.str();

 }

 void train(string fileName) {

 }

 void getFile(string dirName, int num) {

     static int sum = ;

     string tmp;

     string fileName;

     string snum;

     stringstream ss;

     int cur = ;

     tmp.clear();

     ss << num; ss >> snum;

     ifstream fileRead;

     for (; ; cur++) {

         i2s(tmp, cur);

         fileName = dirNames[num] + snum + "_" + tmp + jpg;

         if (cur == ) cout << "start file name : " << fileName << endl;

         fileRead.open(fileName);

         if (!fileRead) {

             cout << "end file name : " << fileName << endl;

             break;

         }

         fileRead.close();

         train(fileName);

     }

     sum += cur - ;

     cout << "current number of samples : " << sum << endl << endl;

 }

 int main() {

     int i = ;

     for (int i = ; i != ; i++) {

         getFile(dirNames[i], i);

     }

     return ;

 }