C / C++ / MFC

string log(string);

pl_kode wrote:

I have also included the function string log(string) but still that error persists.

extern string log(string);

extern"C"
void Logger::logMIN(string message)
{
	log(message);		
}

Linking...
Logger.obj : error LNK2001: unresolved external symbol "class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> > __cdecl log(class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> > ) " (?l
og@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V12@@Z)
Debug/test_dll_log.exe : fatal error LNK1120: 1 unresolved externals
</char></char,struct></char></char,struct>

pl_kode wrote:

extern string log(string);

log(string message)
{
 cout<<message;
}

string log(string message)
{
  cout << message;
  return message;
}

extern void log(string message);

void log (string message)
{
  cout << message;
}