void AddNewLecturer(Lecturer c)
{
	ostringstream text;
	ifstream fin("Lecturer.txt");
	fin>>n; fin.ignore();
	text<<fin.rdbuf();
	string str=text.str();
	fin.close();
	if(str.find(c.FullName)==-1) 
	{
		n++;
		ofstream fout("Lecturer.txt");
		fout<<n<<endl;
		fout<<str;
		fout.close();
	}
}
void ImportLecture(Lecture *c,int n)
{
	ReadTXTLecturer(c,n);
	ifstream fin("schedule.csv");
	Lecturer temp;
	while(!fin.eof)
	{
		getline(fin,,',');  // doc 1 ong
		AddNewLecturer(temp);
	}
}
void AddNewLecturer(Lecturer c)
{
	ostringstream text;
	ifstream fin("Lecturer.txt");
	fin>>n; fin.ignore();
	text<<fin.rdbuf();
	string str=text.str();
	fin.close();
	if(str.find(c.FullName)==-1) 
	{
		n++;
		ofstream fout("Lecturer.txt");
		fout<<n<<endl;
		fout<<str<<endl;
		four<<c......  // them ong moi
		fout.close();
	}
}
void ImportLecture(Lecture *c,int n)
{
	ReadTXTLecturer(c,n);
	ifstream fin("schedule.csv");
	Lecturer temp;
	while(!fin.eof)
	{
		getline(fin,,',');  // doc 1 ong
		AddNewLecturer(temp);
	}
}