Redefined symbols on link

Hello,

I have a VC6 project I'm trying to compile however I get a ton of "already defined" messages on linking. I am pretty sure this is due to including files where they shouldn't be so can someone give me a rundown on where includes should go?

Here are the basics of the includes by file:

driver.cpp
#include "..\state.h"

state.cpp
#include "state.h"
#include "packet.h"

player.cpp
#include "player.h"
#include "deck.h"

deck.h

hopper.h
#include "deck.h"

player.h

state.h

Every function I call in player, hopper or deck results in something like this:
state.obj : error LNK2005: "public: __thiscall ADeck::ADeck(void)" (??0ADeck@@QAE@XZ) already defined in StateTester.obj

Thanks for the help