写出C语言五子棋的极大极小值Ai算法

好的，以下是C语言五子棋极大极小值算法的实现：

#define MAX_DEPTH 4 // 最大搜索深度

// 评估函数，用于估算当前棋局对AI的优劣势
int evaluate(int board[15][15], int player) {
    // TODO: 返回当前棋局对AI的优劣势
}

// 极大极小值算法
int alpha_beta(int board[15][15], int depth, int alpha, int beta, int player) {
    if (depth == MAX_DEPTH) {
        return evaluate(board, player);
    }

    int best_score = (player == 1) ? -9999 : 9999;
    for (int i = 0; i < 15; i++) {
        for (int j = 0; j < 15; j++) {
            if (board[i][j] == 0) {
                board[i][j] = player;
                int score = -alpha_beta(board, depth + 1, -beta, -alpha, 3 - player);
                board[i][j] = 0;

                if (score > best_score) {
                    best_score = score;
                }
                if (player == 1 && score > alpha) {
                    alpha = score;
                }
                if (player == 2 && score < beta) {
                    beta = score;
                }
                if (alpha >= beta) {
                    return best_score;
                }
            }
        }
    }

    return best_score;
}

// AI 下棋
void ai_play(int board[15][15]) {
    int best_i = -1, best_j = -1;
    int best_score = -9999;
    for (int i = 0; i < 15; i++) {
        for (int j = 0; j < 15; j++) {
            if (board[i][j] == 0) {
                board[i][j] = 1;
                int score = -alpha_beta(board, 1, -9999, 9999, 2);
                board[i][j] = 0;

                if (score > best_score) {
                    best_score = score;
                    best_i = i;
                    best_j = j;
                }
            }
        }
    }

    board[best_i][best_j] = 1;
}

以上代码实现了一个简单的五子棋AI，使用的是极大极小值算法，评估函数还需要根据实际情况进行修改。