how to make dungeon crawl with classes?

[nand]

Hello,
I recently the dungeon crawl exercice (http://www.cplusplus.com/forum/articles/12974/)

Make a program that outputs a simple grid based gameboard to the screen using either numbers or characters.
i.e.

. . . . . . . . . .
. G . . . . . . . .
. . . . . . T . . .
. . . . . . . . . .
. . . . T . . . . .
. . . . . . T . . .
. . . . . . . . . X

Allow the user (marked by G in the example) to move either up, down, left, or right each turn. If the player steps on a trap then they lose. If the make it to the treasure 'X' then they win.

★★ Add enemies that move randomly in any direction once per turn. (enemies just like traps cause the player to lose if touched)

And I want to solve this using classes.
I am trying to find a way to have the player and board distinct classes with private data.
The problem is that I don't know how to make the move function (specifically how to check for a valid move). I tryed something, but I always end up to cyclic dependency ( a pointer to the board object in the player object and a pointer to the player object in the board object ). This is a major problem, because things get so complicated that I can't manage to get it working.

Do you have any hints or ideeas about how can this be done?

[kev82]

First idea off the top of my head, not necessarily the best one. Obviously some implementation details missing.

typedef enum {md_up, md_left, md_down, md_right} MoveDir;

class Player
{
  int xPos_;
  int yPos_;
public:
  const int xPos() const { return xPos_; }
  const int yPos() const { return yPos_; }
};

class Board
{
public:
  void generateMoves(const Player &p, std::vector<MoveDir> &moves) {
    if(p.xPos() > 0) moves.push_back(md_left);
    if(p.xPos() < width-1) moves.push_back(md_right);
    ...
    ...
  }
};

[MottMan]

Before the move is actually made check the position you are moving to in the array (which I assume you are using for the board) and output to the player whether or not the move is valid.

If you are not using an array for the board I highly recommend you do.


As for classes, kev82 has given you a good base to work with.

[nand]

Hi,

I implemented something that works using classes and a vector, as you suggested.
It's not quite dungeon crawl, more like quake deathmatch board game. But I will implement oponents also.

Thank you for your help!