c语言洛谷p1838三子棋

三子棋是一种非常经典的棋类游戏，它的规则非常简单，只需要两个人轮流将棋子放在一个3x3的棋盘上，先将三个棋子连成一条线的人获胜。下面是一个简单的 C 语言实现：

#include <stdio.h>

// 棋盘大小
#define BOARD_SIZE 3

// 棋子类型
#define EMPTY 0
#define BLACK 1
#define WHITE 2

// 判断是否胜利
int check_win(int board[BOARD_SIZE][BOARD_SIZE], int player) {
    // 判断横向是否连成一条线
    for (int i = 0; i < BOARD_SIZE; i++) {
        int win = 1;
        for (int j = 0; j < BOARD_SIZE; j++) {
            if (board[i][j] != player) {
                win = 0;
                break;
            }
        }
        if (win) {
            return 1;
        }
    }
    // 判断纵向是否连成一条线
    for (int j = 0; j < BOARD_SIZE; j++) {
        int win = 1;
        for (int i = 0; i < BOARD_SIZE; i++) {
            if (board[i][j] != player) {
                win = 0;
                break;
            }
        }
        if (win) {
            return 1;
        }
    }
    // 判断对角线是否连成一条线
    int win = 1;
    for (int i = 0; i < BOARD_SIZE; i++) {
        if (board[i][i] != player) {
            win = 0;
            break;
        }
    }
    if (win) {
        return 1;
    }
    win = 1;
    for (int i = 0; i < BOARD_SIZE; i++) {
        if (board[i][BOARD_SIZE - 1 - i] != player) {
            win = 0;
            break;
        }
    }
    if (win) {
        return 1;
    }
    return 0;
}

// 打印棋盘
void print_board(int board[BOARD_SIZE][BOARD_SIZE]) {
    for (int i = 0; i < BOARD_SIZE; i++) {
        for (int j = 0; j < BOARD_SIZE; j++) {
            if (board[i][j] == BLACK) {
                printf("X");
            } else if (board[i][j] == WHITE) {
                printf("O");
            } else {
                printf("-");
            }
        }
        printf("\n");
    }
}

int main() {
    int board[BOARD_SIZE][BOARD_SIZE];
    // 初始化棋盘
    for (int i = 0; i < BOARD_SIZE; i++) {
        for (int j = 0; j < BOARD_SIZE; j++) {
            board[i][j] = EMPTY;
        }
    }
    int player = BLACK; // 黑方先手
    while (1) {
        // 打印当前棋盘
        print_board(board);
        // 判断当前玩家是否胜利
        if (check_win(board, player)) {
            printf("%s wins!\n", player == BLACK ? "BLACK" : "WHITE");
            break;
        }
        // 判断是否平局
        int full = 1;
        for (int i = 0; i < BOARD_SIZE; i++) {
            for (int j = 0; j < BOARD_SIZE; j++) {
                if (board[i][j] == EMPTY) {
                    full = 0;
                    break;
                }
            }
            if (!full) {
                break;
            }
        }
        if (full) {
            printf("Tie!\n");
            break;
        }
        // 让当前玩家下棋
        int row, col;
        printf("%s's turn, please enter row and column (1-3): ", player == BLACK ? "BLACK" : "WHITE");
        scanf("%d %d", &row, &col);
        row--;
        col--;
        if (row < 0 || row >= BOARD_SIZE || col < 0 || col >= BOARD_SIZE || board[row][col] != EMPTY) {
            printf("Invalid move, please try again!\n");
        } else {
            board[row][col] = player;
            player = player == BLACK ? WHITE : BLACK;
        }
    }
    return 0;
}

这个程序会不断循环让两个玩家轮流下棋，直到有一方获胜或者平局。在每个回合中，程序会先打印当前的棋盘状态，然后判断当前玩家是否胜利，如果胜利就输出胜利信息并结束游戏，否则判断是否平局，如果平局就输出平局信息并结束游戏，否则让当前玩家输入要下的位置，判断是否合法，如果合法就将棋子放置在棋盘上，并交换玩家。