boost类库年、月、日获取

char startDatetime[20] = "20130620143525";
  date myUndefineDate = from_undelimited_string(startDatetime);
  cout << to_iso_string(myUndefineDate) << endl;
  int nYear = myUndefineDate.year();
  int nMonth = myUndefineDate.month();
  int nDay = myUndefineDate.day();

  cout << "年" << nYear << endl;
  cout << "月" << nMonth <<endl;
  cout << "日" << nDay << endl;