用c语言写一个较为复杂的（可以略过评估函数）六子棋博弈树的代码

好的，以下是一个简单的六子棋博弈树代码，实现了alpha-beta剪枝算法，可以作为参考：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define BOARD_SIZE 15
#define MAX_DEPTH 4

#define EMPTY 0
#define BLACK 1
#define WHITE 2

int board[BOARD_SIZE][BOARD_SIZE];

int max(int a, int b) {
    return a > b ? a : b;
}

int min(int a, int b) {
    return a < b ? a : b;
}

int evaluate(int color) {
    // 略过评估函数
}

int alpha_beta(int depth, int alpha, int beta, int color) {
    if (depth == MAX_DEPTH) {
        return evaluate(color);
    }
    if (color == BLACK) {
        int best = -100000;
        for (int i = 0; i < BOARD_SIZE; i++) {
            for (int j = 0; j < BOARD_SIZE; j++) {
                if (board[i][j] == EMPTY) {
                    board[i][j] = BLACK;
                    best = max(best, alpha_beta(depth + 1, alpha, beta, WHITE));
                    board[i][j] = EMPTY;
                    alpha = max(alpha, best);
                    if (beta <= alpha) {
                        return best;
                    }
                }
            }
        }
        return best;
    } else {
        int best = 100000;
        for (int i = 0; i < BOARD_SIZE; i++) {
            for (int j = 0; j < BOARD_SIZE; j++) {
                if (board[i][j] == EMPTY) {
                    board[i][j] = WHITE;
                    best = min(best, alpha_beta(depth + 1, alpha, beta, BLACK));
                    board[i][j] = EMPTY;
                    beta = min(beta, best);
                    if (beta <= alpha) {
                        return best;
                    }
                }
            }
        }
        return best;
    }
}

void computer_move(int *x, int *y) {
    int best = -100000;
    for (int i = 0; i < BOARD_SIZE; i++) {
        for (int j = 0; j < BOARD_SIZE; j++) {
            if (board[i][j] == EMPTY) {
                board[i][j] = BLACK;
                int score = alpha_beta(0, -100000, 100000, WHITE);
                board[i][j] = EMPTY;
                if (score > best) {
                    best = score;
                    *x = i;
                    *y = j;
                }
            }
        }
    }
}

int main() {
    memset(board, 0, sizeof(board));
    int x, y;
    while (1) {
        printf("Please input your move (x y): ");
        scanf("%d %d", &x, &y);
        board[x][y] = WHITE;
        computer_move(&x, &y);
        board[x][y] = BLACK;
    }
    return 0;
}

该代码实现了一个简单的六子棋AI，使用alpha-beta剪枝算法对博弈树进行搜索，每次计算出当前每个空位下子后的分数，选取分数最高的位置作为AI的下一步。