用c语言写一个五子棋游戏

好的，以下是一个简单的五子棋游戏的 C 语言代码。请注意，这个代码可能不是最优的，但它可以作为一个起点来理解五子棋游戏的实现方式。

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

#define BOARD_SIZE 15 // 棋盘大小

typedef enum { // 定义棋子类型
    EMPTY,
    BLACK,
    WHITE
} PieceType;

PieceType board[BOARD_SIZE][BOARD_SIZE]; // 棋盘

void print_board() { // 打印棋盘
    printf("  ");
    for (int i = 0; i < BOARD_SIZE; i++) {
        printf("%c ", 'A' + i);
    }
    printf("\n");
    for (int i = 0; i < BOARD_SIZE; i++) {
        printf("%2d", i + 1);
        for (int j = 0; j < BOARD_SIZE; j++) {
            if (board[i][j] == EMPTY) {
                printf(" +");
            } else if (board[i][j] == BLACK) {
                printf(" x");
            } else {
                printf(" o");
            }
        }
        printf("\n");
    }
}

bool is_valid_move(int row, int col) { // 判断移动是否有效
    return row >= 0 && row < BOARD_SIZE && col >= 0 && col < BOARD_SIZE && board[row][col] == EMPTY;
}

bool is_win(int row, int col, PieceType piece) { // 判断是否获胜
    int count = 0;
    for (int i = row - 4; i <= row + 4; i++) { // 横向判断
        if (i < 0 || i >= BOARD_SIZE) continue;
        if (board[i][col] == piece) {
            count++;
            if (count == 5) return true;
        } else {
            count = 0;
        }
    }
    count = 0;
    for (int j = col - 4; j <= col + 4; j++) { // 竖向判断
        if (j < 0 || j >= BOARD_SIZE) continue;
        if (board[row][j] == piece) {
            count++;
            if (count == 5) return true;
        } else {
            count = 0;
        }
    }
    count = 0;
    for (int i = row - 4, j = col - 4; i <= row + 4; i++, j++) { // 左上到右下判断
        if (i < 0 || i >= BOARD_SIZE || j < 0 || j >= BOARD_SIZE) continue;
        if (board[i][j] == piece) {
            count++;
            if (count == 5) return true;
        } else {
            count = 0;
        }
    }
    count = 0;
    for (int i = row - 4, j = col + 4; i <= row + 4; i++, j--) { // 右上到左下判断
        if (i < 0 || i >= BOARD_SIZE || j < 0 || j >= BOARD_SIZE) continue;
        if (board[i][j] == piece) {
            count++;
            if (count == 5) return true;
        } else {
            count = 0;
        }
    }
    return