#include <string>
#include <fstream>
#include <sstream>
#include <iostream>

#define NOFCHANNELS 5

int fly(const char *fname = "trial_3.txt")
{
  int npoints = 0;
  // http://www.cplusplus.com/reference/string/
  std::string line;
  
  // http://www.cplusplus.com/reference/iostream/ifstream/
  std::ifstream ifs(fname);
  
  while(1) {
    // http://www.cplusplus.com/reference/string/getline/
    getline(ifs, line);
    if ( ! ifs.good() ) break;
    
#if 0 /* 0 or 1 */
    std::cout << "line = " << line << std::endl;
#endif /* 0 or 1 */
    
    // http://www.cplusplus.com/reference/iostream/istringstream/
    istringstream s(line);
    
    std::cout << "entries[] =";
    
    for(int i = 0; i < (NOFCHANNELS); i++) {
      double tmp = 0.0;
      s >> tmp;
      if ( ! s.good() ) {
	std::cout << std::endl;
	std::cout << "ERROR in line : " << (npoints + 1)
		  << " : in column : " << i << " or " << (i + 1)
		  << std::endl;
	break;
      } // if ( ! s.good() )
      
      std::cout << "  " << tmp;
    } // for(int i = 0; i < (NOFCHANNELS); i++)
    
    std::cout << std::endl;
    
    npoints++;
  } // while(1)
  
#if 0 /* 0 or 1 */
  std::cout << "npoints = " << npoints << std::endl;
#endif /* 0 or 1 */
  
  return npoints;
} // int fly(const char *fname = "trial_3.txt")