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// File: connect4.h (part of the namespace main_savitch_14)
#ifndef MAIN_SAVITCH_CONNECT4
#define MAIN_SAVITCH_CONNECT4
#include <queue> // Provides queue<string>
#include <string> // Provides string
#include "game.h" // Provides the game base class
namespace main_savitch_14
{
class connect4 : public game
{
public:
// STATIC CONSTANTS
static const int ROWS = 6;
static const int COLUMNS = 7;
// CONSTRUCTOR
connect4( );
protected:
// *******************************************************************
// VIRTUAL FUNCTIONS (these are overridden from the game base class)
// *******************************************************************
// Return a pointer to a copy of myself:
virtual game* clone( ) const;
// Compute all the moves that the next player can make:
virtual void compute_moves(std::queue<std::string>& moves) const;
// Display the status of the current game:
virtual void display_status( ) const;
// Evaluate the current board position.
// NOTE: Positive values are good for the last_mover( ).
virtual int evaluate( ) const;
// Return true if the current game is finished:
virtual bool is_game_over( ) const;
// Return true if the given move is legal for the next player:
virtual bool is_legal(const std::string& move) const;
// Have the next player make a specified move:
virtual void make_move(const std::string& move);
// Restart the game from the beginning:
virtual void restart( );
private:
// HELPER FUNCTIONS
int value(int row, int column, int delta_r, int delta_c) const;
// HELPER CONSTANTS. See connect4.cxx for their values.
static const int COLUMN_DISPLAY_WIDTH;
static const int FOUR_VALUE;
static const std::string MOVE_STRINGS[COLUMNS];
// MEMBER VARIABLES TO TRACK THE STATE OF THE GAME
who data[ROWS][COLUMNS];
int many_used[COLUMNS];
int most_recent_column;
};
}
#endif
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