Question

Hello I am working on a tic-tac-toe project on my own. I am not taking a programming class so its not homework.

I have written pretty much the rest of the code and am now working on the AI.

For the AI i am going to have it take a copy of the (2 dimensional array) and it check if it can win in a move, then if the player can, then if it can in 2 moves, then the player and so on, there are some other things i will include. So in order to do this i think i need to pass a copy of the array, but i am not sure how to copy an array. So that is basically my question, how do you copy an array?

Answer 1

You can wrap the array into a class, in which case it’ll be copied automatically by the default-generated copy constructor and assignment operator:

enum EField { empty, cross, oh };

typedef std::array<EField, 9> TTTBoard;  // C++11, or use std::tr1::array

Or do it manually:

struct TTTBoard
{
    EField data[9];   // or even EField data[3][3]
};

Now you can copy it at will:

TTTBoard b;
TTTBoard c = b;