在类中没有找到重载的成员函数

这是我收到的错误。

Error   4   error C2511: 'Vector<T> Menus::sortListBy(sortType,Vector<T>)' 
: overloaded member function not found in 'Menus'   z:documentsvisual 
studio 2010projectsoo_cwoo_cwmenus.cpp  410 1   OO_CW

我相信这与我试图使用一个包含在头中但似乎没有被转移到其他类的enum有关。

下面是所涉及的2个头和我正在努力的函数::

Menus.cpp:

 Vector<connections> Menus::sortListBy(sortType sortKey,Vector<connections> sortList){}

Menus.h

#pragma once
#include "std_lib_facilities.h"
#include "Airport.h"
class Journey;
#include <string>

typedef enum {BACK,FORWARD,INVALID,OPTIONS} result;
typedef enum {BOOK,VIEW,EXIT} firstChoice;

class Menus
{
public:
  Menus(void);
  ~Menus(void);
  firstChoice firstMenu();
  Airport bookingMenuFirst(Vector<Airport>);
  Airport bookingMenuSecond(Vector<connections>,Vector<Airport>);
  airlines bookingMenuThird(Airport,Airport,Journey&);
  string bookingMenuDate();
  bool showReciept(string,string,string,string,double,double,double);
  string showRecieptNames();
  void readReciept(string);
  void optionMenu(Journey);
  Vector<connections> sortListBy(sortType,Vector<connections>);
};

Journey.h

#pragma once
#include "std_lib_facilities.h"
#include "Airport.h"
#include <string>
#include "Menus.h"
enum sortType {PRICE,TIME} ;
class Journey
{
 public:
  Journey(void);
  ~Journey(void);
//accessors
  Airport getStart();
  Airport getEnd();
  string getDate();
  airlines getAirline();
  string getStringAirline();
  double getTime();
  double getPrice();
  sortType getSort();
  //modifiers
  void setStart(Airport);
  void setEnd(Airport);
  void setPrice(double);
  void setTime(double);
  void setAirline(airlines);
  void setDate(string);
  void saveBooking();
  void setSort(sortType);

private:
  Airport startAirport;
  Airport endAirport;
  double price;
  double time;
  string date;
  airlines airline;
  Vector<string> splitBy(string,string);
  sortType sortingBy;
};

menu .cpp头语句

#include "Menus.h"
#include "std_lib_facilities.h"
#include "Airport.h"
#include "Journey.h"
#include <string>
using namespace std;