#include <iostream>
#include <fstream>
#include <cstring>
#include <stdlib.h>


using namespace std;

const int   MAX_CHARS_PER_LINE = 1000;
const int   MAX_TOKENS_PER_LINE = 10;
const char* DELIMITER = "\t";
				
bool debug = true;
const char* infname = "data.txt";

// main routine

void ReadData() {

	// create a file-reading object
	//------------------------------
	
	ifstream infile;
	infile.open(infname); // open a file

	if (infile.fail()){ 
		cerr << "\nData file could not be opened.\n";
		continue;// exit if file not found
	}

	// parse the acm file by reading line by line

	while (!infile.eof())
	{
		
		// read an entire line into memory
		char buf[MAX_CHARS_PER_LINE];
		infile.getline(buf, MAX_CHARS_PER_LINE);

		// parse the line into tab-delimited tokens
		// array to store memory addresses of the tokens in buf
		char* token[MAX_TOKENS_PER_LINE] = {0}; // initialize to 0
		
		char* pEnd;// used with strtod(s,p) as pointer to end character
				   // atof() did not really work very well, as we'd better
				   // keep double precision

		// parse the line
		token[0] = strtok(buf, DELIMITER); // first token

		// now find what we need and do stuff		
		if (token[0]) // zero if line is blank
		{
			if(debug) cerr << atoi(token[0]) << "  ";
			
			for (Int_t n = 1; n < MAX_TOKENS_PER_LINE; n++)
			{
		    	token[n] = strtok(NULL, DELIMITER); // subsequent tokens
		    	if (!token[n]) break; // no more tokens
				
				//val = atof(number.c_str());
				val = strtod(token[n], &pEnd);
				cerr << "tok[n]:" << token[n] << ", val=" << 
						   val << "\t";
				
			} cerr << "\n";
			
		}
		
		if (!token[0]) break; // no more stuff at all		
	
	} // end while() loop

	infile.close();
	
}// end ReadData()