Thread: Overloaded Operator Causes Unresolved External Symbol

Once again I seem to be having unresolved external symbol errors for no reason. Here are the errors:

Code:

1>Main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: class std::basic_istream<char,struct std::char_traits<char> > & __thiscall std::basic_istream<char,struct std::char_traits<char> >::seekg(long,enum std::ios_base::seekdir)" (__imp_?seekg@?$basic_istream@DU?$char_traits@D@std@@@std@@QAEAAV12@JW4seekdir@ios_base@2@@Z) referenced in function "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl read(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?read@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V12@@Z)
1>Main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::basic_ifstream<char,struct std::char_traits<char> >::open(char const *,int)" (__imp_?open@?$basic_ifstream@DU?$char_traits@D@std@@@std@@QAEXPBDH@Z) referenced in function "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl read(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?read@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V12@@Z)
1>Main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall std::basic_ofstream<char,struct std::char_traits<char> >::basic_ofstream<char,struct std::char_traits<char> >(char const *,int)" (__imp_??0?$basic_ofstream@DU?$char_traits@D@std@@@std@@QAE@PBDH@Z) referenced in function "bool __cdecl write(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?write@@YA_NV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@0@Z)
1>Main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl std::operator<<<char,struct std::char_traits<char> >(class std::basic_ostream<char,struct std::char_traits<char> > &,char const *)" (__imp_??$?6DU?$char_traits@D@std@@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@PBD@Z) referenced in function "public: bool __thiscall File::Erase(void)" (?Erase@File@@QAE_NXZ)
1>Main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall std::basic_ifstream<char,struct std::char_traits<char> >::basic_ifstream<char,struct std::char_traits<char> >(char const *,int)" (__imp_??0?$basic_ifstream@DU?$char_traits@D@std@@@std@@QAE@PBDH@Z) referenced in function "public: bool __thiscall Money_Tracker::Initialize(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,struct HWND__ *)" (?Initialize@Money_Tracker@@QAE_NV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@PAUHWND__@@@Z)

The problem is stemming from where I use a class and I have an overloaded operator. However, even

Code:

cout << "Something or other";

doesn't work. I've tried reinstalling Visual Studio, and the Platform SDK, but to no avail. Can anyone help me?

I have tried making a new project, although I'll try again because I may have changed something...
I have all of the platform SDK paths setup too, and I'm using Visual Studio 2008.

Visual Studio 2008 comes with the platform sdk i believe.

The problem is stemming from where I use a class and I have an overloaded operator.

So it works if you remove the class with the overloaded operator? Which operator are you overloading? Is it << or >> ?

In fact I'm using both the << and >> operator. Here's the definition for one of the classes:

Code:

class Output
{
public:
	int iWindowName;
	HWND hwnd;
	Output (void);
	Output (int windowName, HWND hWnd) {
		iWindowName = windowName;
		hwnd = hWnd;
	}
	bool operator <<(std::string out);
	bool operator <<(int out);
	bool operator <<(double out);
	Output operator ()(int windowName)
	{
		iWindowName = windowName;
		return *this;
	}
	Output operator ()(HWND hWnd, int windowName)
	{
		iWindowName = windowName;
		hwnd = hWnd;
		return *this;
	}
} Cout;

(This code is for simplifying outputting text to other windows). However, like I mentioned it's not only my class that causes the error.

I just tried the following:

Code:

#include <iostream>
#include <fstream>
using namespace std;


int main()
{
	cout << "hi";
	return 0;
}

And it gives me the following error:

Code:

1>Tests.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl std::operator<<<char,struct std::char_traits<char> >(class std::basic_ostream<char,struct std::char_traits<char> > &,char const *)" (__imp_??$?6DU?$char_traits@D@std@@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@PBD@Z) referenced in function _main

I have no idea what the problem is, but I'm considering completely removing VC++ from my computer and reinstalling it.