Question

I want to create some modules for my program. I want to call a function and pass a vector as a parameter. The return value should also be a vector.

My code looks like this

main.cpp
//BlueSmart.cpp : Definiert den Einstiegspunkt für die Konsolenanwendung.
#include "stdafx.h"

#define WIN32_LEAN_AND_MEAN

using namespace std;

#pragma comment(lib, "Irprops.lib")



BLUETOOTH_FIND_RADIO_PARAMS m_bt_find_radio = {
sizeof(BLUETOOTH_FIND_RADIO_PARAMS)
};

BLUETOOTH_RADIO_INFO m_bt_info = {
sizeof(BLUETOOTH_RADIO_INFO),
0,
};

BLUETOOTH_DEVICE_SEARCH_PARAMS m_search_params = {
sizeof(BLUETOOTH_DEVICE_SEARCH_PARAMS),
1,
0,
1,
1,
1,
15,
NULL
};

BLUETOOTH_DEVICE_INFO m_device_info = {
sizeof(BLUETOOTH_DEVICE_INFO),
0,
};

HANDLE m_radio = NULL;
HBLUETOOTH_RADIO_FIND m_bt = NULL;
HBLUETOOTH_DEVICE_FIND m_bt_dev = NULL;

int wmain(int argc, wchar_t **args) {

while(true) {
m_bt = BluetoothFindFirstRadio(&m_bt_find_radio, &m_radio);

do {
  localBluetoothDevices ();

  m_search_params.hRadio = m_radio;
  ::ZeroMemory(&m_device_info, sizeof(BLUETOOTH_DEVICE_INFO));
  m_device_info.dwSize = sizeof(BLUETOOTH_DEVICE_INFO);
  m_bt_dev = BluetoothFindFirstDevice(&m_search_params, &m_device_info);

  vector<wstring> vec;
  int m_device_id = 0;
  do {
   wostringstream tmp;
   ++m_device_id;
   //Something like this <----------------------------------------
   externBluetoothDevices (vec);
   //Something like this <----------------------------------------

      wprintf(L"********************************************************************** \n");
   wprintf(L"\tDevice %d:\r\n", m_device_id);
   wprintf(L"\t\tName: %s\r\n", m_device_info.szName);
   wprintf(L"\t\tAddress: %02x:%02x:%02x:%02x:%02x:%02x\r\n", m_device_info.Address.rgBytes[0], m_device_info.Address.rgBytes[1], m_device_info.Address.rgBytes[2], m_device_info.Address.rgBytes[3], m_device_info.Address.rgBytes[4], m_device_info.Address.rgBytes[5]);
   wprintf(L"====================================================================== \n");


   for (int i = 0; i < 6; i++) {
    tmp << hex << m_device_info.Address.rgBytes [i];
    if (i < 5)
     tmp << L':';
   }

   vec.push_back(tmp.str());

  } while(BluetoothFindNextDevice(m_bt_dev, &m_device_info));


  BluetoothFindDeviceClose(m_bt_dev);
  //Sleep(10*1000*60);
  Sleep(10000);

} while(BluetoothFindNextRadio(&m_bt_find_radio, &m_radio));
BluetoothFindRadioClose(m_bt);
}
return 0;
}

//Lokal verfügbare bzw. angeschlossene Bluetooth-Devices
void localBluetoothDevices (){
  int m_radio_id = 0;
  m_radio_id++;
  BluetoothGetRadioInfo(m_radio, &m_bt_info);      
  //Lokaler Bluetoothadapter
  wprintf(L"====================================================================== \n");
  wprintf(L"Local Device Nr. %d\n", m_radio_id);
  wprintf(L"\tName: %s\r\n", m_bt_info.szName);
  wprintf(L"\tAddress: %02x:%02x:%02x:%02x:%02x:%02x\r\n",      m_bt_info.address.rgBytes[0], m_bt_info.address.rgBytes[1], m_bt_info.address.rgBytes[2], m_bt_info.address.rgBytes[3], m_bt_info.address.rgBytes[4], m_bt_info.address.rgBytes[5]);

 }

//Extern verfügbare bzw. Bluetooth-Devices
 vector<wstring> externBluetoothDevices (vector<wstring> &vec){
return vec;
 }

stdafx.h

 #pragma once

 #include "targetver.h"

 #include <stdio.h>
 #include <tchar.h>
 #include <winsock2.h>
 #include <windows.h>
 #include <stdlib.h>
 #include <bthdef.h>
 #include <BluetoothAPIs.h>
 #include <iostream>
 #include <vector>
 #include <algorithm>
 #include <string>
 #include <sstream>
 #include <iomanip>
 #include <conio.h>

 void localBluetoothDevices ();
 vector<wstring> externBluetoothDevices (vector<wstring>);

It says that vector is not a known type. What am I doing wrong?

Answer 1

In stdafx.h replace

vector<wstring> externBluetoothDevices (vector<wstring>);

with

std::vector<std::wstring> externBluetoothDevices (std::vector<std::wstring>);

Basically the issue was although you put using namespace std; in your cpp file that doesn’t count in your header file which is before the using declaration is seen.

Also note that your defintion in the cpp file is different. In the cpp file you have a reference

vector<wstring> externBluetoothDevices (vector<wstring>&);

Decide which you really want.