String problems

Ok, so I'm making this BlackJack game, and it uses strings, and when I use a "cout << stringGoesHere" I get the following error:

Code:

Linking...
BJMain.obj : error LNK2001: unresolved external symbol "public: static class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl PlayingCard::formatCard(int)" (?formatCard@PlayingCard@@SA?AV?$basic_string@DU?$ch
ar_traits@D@std@@V?$allocator@D@2@@std@@H@Z)
Debug/BlackJack.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

BlackJack.exe - 2 error(s), 0 warning(s)

What's up with that? I #included <string> and I'm running VC++.

Do you have:
using namespace std;
in your code?

Argh!

Code:

// Deck.h: interface for the Deck class.
//
//////////////////////////////////////////////////////////////////////

#include "PlayingCard.h"

#if !defined(AFX_DECK_H__F82EEDCF_483B_48F6_8843_87FC69005F06__INCLUDED_)
#define AFX_DECK_H__F82EEDCF_483B_48F6_8843_87FC69005F06__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class Deck  
{
public:
	Deck();
	~Deck();
	
	void shuffle();
	void resetCards();

	int *deal(int cards);

protected:
	int count;
	PlayingCard card[52];

};

#endif // !defined(AFX_DECK_H__F82EEDCF_483B_48F6_8843_87FC69005F06__INCLUDED_)

Code:

// PlayingCard.h: interface for the PlayingCard class.
//
//////////////////////////////////////////////////////////////////////
#include <string>

#if !defined(AFX_PLAYINGCARD_H__E9A6857C_CA56_4680_AAD6_D63942541399__INCLUDED_)
#define AFX_PLAYINGCARD_H__E9A6857C_CA56_4680_AAD6_D63942541399__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class PlayingCard  
{
public:
	PlayingCard(int cardNum);
	PlayingCard();

	int getValue();
	int getCard();
	int getRealValue();

	static int *cardToValue(int cardNum);
	void setUsed(bool ifUsed);

	std::string formatCard();
	static std::string formatCard(int cardNum);

	bool isUsed();

	void setValue(int cardNum);
protected:
	int value;
	int suit;
	bool used;
};

#endif // !defined(AFX_PLAYINGCARD_H__E9A6857C_CA56_4680_AAD6_D63942541399__INCLUDED_)

Code:

#include "Deck.h"
#include "PlayingCard.h"

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

int main()
{
	Deck theDeck;

	int *newCards=theDeck.deal(2);
	for(int x=0;x<*newCards;x++)
	{
		string card=PlayingCard::formatCard(*(newCards+1+x));
		cout << "You have been dealt a " << card << "\n";
	}
	return 1;
}

Code:

--------------------Configuration: BlackJack - Win32 Debug--------------------
Linking...
BJMain.obj : error LNK2001: unresolved external symbol "public: static class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl PlayingCard::formatCard(int)" (?formatCard@PlayingCard@@SA?AV?$basic_string@DU?$ch
ar_traits@D@std@@V?$allocator@D@2@@std@@H@Z)
Debug/BlackJack.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

BlackJack.exe - 2 error(s), 0 warning(s)

If I do using namespace std; after the string in PlayingCard, I get like 200 errors of "Ambiguous symbol."

Looks like a linker error, in which case the namespace wouldn't help anyway. Plus you have std::string anyway. I'll see if I can compile it.

What's your formatCard function look like?

> string card=PlayingCard::formatCard(*(newCards+1+x));

Maybe you need:
static string card=PlayingCard::formatCard(*(newCards+1+x));

I notice you have static in your formatCard declaration. I'm not sure why though.

Ahh, I fixed it... I defined the string.h twice within my code, and when I deleted one declaration, everything worked.

Thanks for the help, though!