Thread: Linking error LNK2019: unresolved external symbol

Hi,

I have a miniproject in MVS2005 wich keeps bugging me with linking errors. I've read the documentation provided by MSV related to this error, and nothing seems to solve my problem.
So I came to you again for a helping hand.

ListaGenerica.h:

Code:

#include <iostream>
using namespace std;

template <class DataType>
struct NodeList
{
	DataType m_sData;
	NodeList* nxt;
	NodeList* prv;
};

template <class DataType>
class DLnkList
{
protected:
	NodeList<DataType>* pHead;
public:
	DLnkList()
	{
		pHead = new NodeList<DataType>;
		pHead = NULL;
	}
	~DLnkList()
	{
		while( pHead != NULL )    
		{
			NodeList<DataType>* pAux = pHead; 
			pHead = pAux->nxt;   
			delete pAux;  
			cout<<"destr";
		}
	}
	void AddNode(DataType Data);
	void ShowList();
};

The ListaGenerica.cpp:

Code:

#include "ListaGenerica.h"
#include <string>
#include <iostream>
using namespace std;

template <class DataType>
void  DLnkList<DataType>::AddNode(DataType Data)
{
	NodeList<DataType>* pNewNode = new NodeList<DataType>;
	pNewNode->nxt = pHead;
	pHead = pNewNode;
	pNewNode->m_sData = Data;
}

template <class DataType>
void DLnkList<DataType>::ShowList()
{
	NodeList<DataType>* pAux;
	pAux = pHead; 
	while( pAux != NULL )         
	{
		cout << endl << pAux->m_sData;
		pAux = pAux->nxt;
	}
}

And Main.cpp:

Code:

#include "ListaGenerica.h"
#include <string>
#include <iostream>
using namespace std;

int main(void)
{
	DLnkList<int>* ol = new DLnkList<int>;
	ol->AddNode(5555);
	ol->ShowList();
	delete ol;
}

and here are the errors:

Code:

1>main.obj : error LNK2019: unresolved external symbol "public: void __thiscall DLnkList<int>::ShowList(void)"
 (?ShowList@?$DLnkList@H@@QAEXXZ) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "public: void __thiscall DLnkList<int>::AddNode(int)"
 (?AddNode@?$DLnkList@H@@QAEXH@Z) referenced in function _main

When i copy the function definitions in main.cpp, te project builds. Why doesn't the builder see the ListaGenerica.cpp?
Any hints?
Tank you.