Problem while reading Greek Letters from a file

[konstantinosdms]

Hi I am new on C++ but I have experience on other languages
I have the following code:

        
        streampos begin,end;        
        char delimeter[3] = {',', '\n', '\0'};
        int numChars = 0;
        int pos1 = 0, pos2 = 0, pos3 = 0, startIndex = 0, studentIndex = 0;
        ifstream file1("Students1.csv", ios::in);
        if (!file1) throw MyExceptions();
        begin = file1.tellg();
        file1.seekg (0, ios::end);
        end = file1.tellg();
        int size =  end - begin;
        file1.seekg(0, ios::beg);      
        char charField[size];         
        while(file1.getline(charField, size, '\n'))
        { 
            char *tmpCharField1 = charField;                        
            numChars = file1.gcount();
            CustomString tmpStudent(tmpCharField1, numChars);
            pos1 = tmpStudent.findCharacter(&delimeter[0], startIndex);
            CustomString tmpStudentCode = tmpStudent.subString(startIndex, pos1);
            pos2 = tmpStudent.findCharacter(&delimeter[0], (pos1 + 1));
            CustomString tmpFirstName = tmpStudent.subString((pos1 + 1), pos2);
            pos3 = tmpStudent.findCharacter(&delimeter[2], (pos2 + 1));
            CustomString tmpSecondName = tmpStudent.subString((pos2 + 1), pos3);
            Student *student1 = new Student(tmpStudentCode, tmpFirstName, tmpSecondName);
            this->StudentVector.push_back(student1);
            studentIndex++; 
        }        
        file1.close();

I am trying to read a file with Greek letters where the file is as this:
SR000001,ΕΠΩΝΥΜΟ 0001,ΟΝΟΜΑ 0001
SR000002,ΕΠΩΝΥΜΟ 0002,ΟΝΟΜΑ 0002
SR000003,ΕΠΩΝΥΜΟ 0003,ΟΝΟΜΑ 0003
SR000004,ΕΠΩΝΥΜΟ 0004,ΟΝΟΜΑ 0004
SR000005,ΕΠΩΝΥΜΟ 0005,ΟΝΟΜΑ 0005
SR000006,ΕΠΩΝΥΜΟ 0006,ΟΝΟΜΑ 0006
SR000007,ΕΠΩΝΥΜΟ 0007,ΟΝΟΜΑ 0007
The format is on UTF8, I use NetBeans 8.1 on Windows 10 64 bit machine with MINGW-64. How can I read the Greek letters as 1 byte data? Please do not say me that the reading is not ok, I have to do an assignment without using string or string methods…

[mbozzi]

UTF-8 is not a fixed-width format. UTF-8 requires more than one byte to represent Greek letters.

It shouldn't matter, though, because std::string knows nothing of text encoding. It is a dumb sequence of char and nothing more.

[dutch]

What exactly is the problem? You should be able to search for the commas just find. As long as you don't need to access individual characters of the fields then it's no problem.

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main() {
    ifstream f("Students1.csv");
    string line;
    while (getline(f, line)) {
        auto end = line.find(',');
        cout << line.substr(0, end) << '\n';
        auto start = end + 1;
        end = line.find(',', start);
        cout << line.substr(start, end - start) << '\n';
        start = end + 1;
        cout << line.substr(start) << '\n';
    }
}