C / C++ / MFC

void CGameMenuPlayerProfileState::setPlayerData(int countryId, int btnId)
{
 ifstream myfile("E://Work//Data//playerdata.txt.txt", ios_base::in);
 std::string line;
 vector<std::string> sets;
 vector<std::string>::iterator it = sets.begin();
 int player_no = (countryId*11)+btnId;

 while(getline(myfile, line))
 {
  //cout<<"File contents moved to Stack!"<<endl;
  sets.push_back(line);
  cout<<line;
 }
}

ifstream myfile("E://Work//Data//playerdata.txt.txt", ios_base::in);
  char* line = "";
  ofstream test("E:\Work\Data\test.txt", ios_base::out);
  
  if(!myfile.is_open())
  {
   cout<<"Opening File E://Work//Data//playerdata.txt failed"<<endl;
   cout<<"ERROR Code:"<<"\t"<<GetLastError()<<endl;
  }
  if(!test.is_open())
  {
   cout<<"Opening File E://Work//Data//test.txt failed"<<endl;
   cout<<"ERROR Code:"<<"\t"<<GetLastError()<<endl;
  }
  if(myfile)
  {
   myfile.getline(line, 1);
   cout<<line<<endl;
   test.write(line, 1);
  }