Inheritance, Polymorphism, and Composition

class item
{
 public:
  item(char *name=NULL, int p=0, int uses=1, int m1=0, int m2=0, int m3=0, int m4=0, int m5=0, int m6=0, int m7=0, int m8=0);
  item(string name=NULL, int p=0, int uses=1, int m1=0, int m2=0, int m3=0, int m4=0, int m5=0, int m6=0, int m7=0, int m8=0);
  virtual ~item();

  int uses() { return myuses; };
  long int price() { return myprice; };

  virtual bool use(Player *p) = 0;
  virtual void undo() = 0;

  bool operator<(const item &right) const;
  bool operator>(const item &right) const;
  bool operator==(const item &right) const;
  bool operator!=(const item &right) const;

 protected:
  string myname;         // Name to use in game & sorting
  long int myprice;      // How much does this item cost to buy (half to sell)
  int mymodifiers[8];    // Up to 8 different modifiers handled in the sub-classes
  int myuses;            // How many times you can use this item
};

[gameserv@titan gameserv]$ make
g++ -Wall  -g -O2 -c aClient.cpp
In file included from pouch.h:4,
                 from player.h:7,
                 from aClient.h:6,
                 from aClient.cpp:1:
item.h:12: error: expected `)' before "name"
item.h:18: error: `Player' has not been declared
item.h:18: error: ISO C++ forbids declaration of `p' with no type
item.h:27: error: `string' does not name a type
item.h:36: error: expected `)' before "name"
item.h:39: error: `Player' has not been declared
item.h:39: error: ISO C++ forbids declaration of `p' with no type
item.h:40: error: `Player' has not been declared
item.h:40: error: ISO C++ forbids declaration of `p' with no type
item.h:47: error: expected `)' before "name"
item.h:50: error: `Player' has not been declared
item.h:50: error: ISO C++ forbids declaration of `p' with no type
item.h:51: error: `Player' has not been declared
item.h:51: error: ISO C++ forbids declaration of `p' with no type
make: *** [aClient.o] Error 1

#ifndef PLAYER_H
#define PLAYER_H

#include <string>

#include "aClient.h"
#include "pouch.h"

using namespace std;

typedef struct monster_ Monster;

class aClient; // forward declaration

class Player {
public:
    Player();
    Player(aClient *);
    Player(char *);
    Player(string);
    ~Player();
    void setData(Player *);
    void setPassword(const char *p);
    void reset();

    long int getFlags() { return flags; };          // Returns the Client's current flags
        // Functions also return the flags after modifying them
    long int setFlags(long int);    // Sets the clients flags to a new value
    long int addFlag(long int);     // Adds a flag to the client's flags
    long int remFlag(long int);     // Removes a flag from the client's current flags

    //weapon *getWeapon() { return w; };
    //armor *getArmor() { return a; };

    //void setWeapon (weapon &);  // Set a player's weapon to some item
    //void setArmor (armor &);    // Set a player's weapon to some item
    int weapon;
    int armor;

    string name;                // Player's Name
    int level;                  // Player's level (1-12)
    long int exp;               // Player's experience
    long int gold;              // Gold on hand
    long int bank;              // Gold in the bank
    int hp;                     // Current Hit Points (health)
    int maxhp;                  // Maximum Hit Points
    int strength;               // Player's Strength
    int defense;                // Player's defensive strength
    int forest_fights;          // Amount of forest fights left today
    int player_fights;          // Amount of player<->player fights for today
    string password;            // Player's encrypted password
    Pouch inventory;            // This contains their potions, etc.
    long int lastcommand;       // timestamp for the last command typed
    long int lastlogin;         // timestamp for the last login

    aClient *client;            // Pointer to the aClient this player is from
    Monster *fight;             // Pointer to the monster the player is currently fighting
    Monster *master;            // Pointer to the master the player is currently fighting
    aClient *battle;            // Pointer to the player this player is currently fighting

private:
    long int flags;             // Player's current flags
    //    weapon *w;                  // Player's weapon
    //armor *a;                   // Player's armor
};