[완료] C++로 데이터 처리관련 질문입니다.

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <map>
 
using namespace std;
 
int main (int argc, char *argv[]) {
 
    if (argc < 2) {
        cout << "Usage: ./map [file]" << endl;
        exit (0);
    }
 
    ifstream fin (argv[1]);
    ofstream fout;
    string nil, hex;
    double time, val;
 
    map <string, map <double, double> > values;
    map <string, map <double, double> >::iterator pitr;
    map <double, double>::iterator itr;
 
    if(fin.is_open()) {
        while (!fin.eof()) {
            fin >> nil;
            fin >> nil;
            fin >> val;
            fin >> time;
            fin >> hex;
 
            values[hex][time] = val;
        }
        fin.close();
    } else {
        cout << "error opening file!" << endl;
        exit (1);
    }
    int size = values.size();
    cout << "size: " << size << endl;
 
    for (pitr = values.begin(); pitr != values.end(); ++pitr) {
        for (itr = pitr->second.begin(); itr != pitr->second.end(); ++itr) {
            cout << " pointer: " << pitr->first;
            cout << " time: " << itr->first;
            cout << " value: " << itr->second << endl;
        }
    }
 
 
    return 0;
}

#include <iostream>
#include <fstream>
#include <string>
#include <map>
 
using namespace std;
 
int main (int argc, char *argv[]) {
 
    if (argc < 2) {
        cout << "Usage: ./map [file]" << endl;
        exit (0);
    }
 
    ifstream fin (argv[1]);
    ofstream fout;
    string nil, hex;
    double time, val;
 
    map <string, map <double, double> > values;
    map <string, map <double, double> >::iterator pitr;
    map <double, double>::iterator itr;
 
    if(fin.is_open()) {
        while (!fin.eof()) {
            fin >> nil;
            fin >> nil;
            fin >> val;
            fin >> time;
            fin >> hex;
 
            values[hex][time] = val;
        }
        fin.close();
    } else {
        cout << "error opening file!" << endl;
        exit (1);
    }
 
    int i;
    int size = values.size();
    string str[size];
 
    for (i=0, pitr=values.begin(); i<size, pitr != values.end(); ++pitr, ++i) {
        str[i].append("result_");
        //str[i].append((string)i.c_str()); // <--- error occurs here!!
        str[i].append(".xg");
        //cout << str[i] << endl;
        fout.open(str[i].c_str());
 
        for (itr = pitr->second.begin(); itr != pitr->second.end(); ++itr) {
            fout << itr->first << "\t" << itr->second << endl;
        }
        fout.close();
    }
 
    return 0;
}

/*
 * Copyright(c) 2005-2008 University College London
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. Neither the name of the University nor of the Laboratory may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE
 *
 * $Id: map.cc 108 2008-04-09 15:02:31Z soohyunc $
 */
 
#include <iostream>
#include <string>
#include <fstream>
#include <sstream>
#include <map>
 
using namespace std;
 
// print instruction
void print_instruction () {
    cout << "Usage: ./map [file] [option]" << endl;
    exit (0);
}
 
// main body
int main (int argc, char *argv[]) {
 
    // print instruction
    if (argc < 3) {
        print_instruction();
    }
 
    ifstream fin (argv[1]); // input file stream
    ofstream fout;          // output file stream
    string sline;           // input string line
    string nil, hex, option;
    double time, val;
 
    option = argv[2];
 
    // map declaration
    map <string, map <double, double> > values;
 
    // iterator declaration
    map <string, map <double, double> >::iterator pitr;
    map <double, double>::iterator itr;
 
    if(fin.is_open()) {
        while (getline(fin, sline)) {
            istringstream isOk(sline);
 
            // check if input is valid
            if (isOk >> nil >> nil >> time >> val >> hex) {
                values[hex][time] = val; // record map value
            }
        }
        fin.close();    // close file
    } else {
        cout << "error opening file!" << endl;
        exit (1);
    }
 
    int i;
    int size = values.size();   // map size (no. of pointers)
 
    for (i=0, pitr=values.begin(); i<size && pitr!=values.end(); ++pitr, i++) {
 
        // string stream (to create file names accordingly)
        stringstream sstr;
        sstr << option << '_' << i+1 << ".xg";
        fout.open(sstr.str().c_str());  // create a file and open to write
 
        // recording values
        for (itr = pitr->second.begin(); itr != pitr->second.end(); ++itr) {
            fout << itr->first << "\t" << itr->second << endl;
        }
 
        fout.close();   // close file
    }
 
    return 0;
}