用C语言写一个井字棋程序

以下是一个简单的井字棋程序的 C 代码示例：

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

char board[3][3]; // 存储棋盘状态

void draw_board(); // 绘制棋盘
int check_winner(); // 判断胜者
int is_board_full(); // 判断棋盘是否已满

int main()
{
    int player = 1; // 1 代表玩家 1，2 代表玩家 2
    int row, col; // 玩家下棋的行列
    int winner = 0; // 胜者

    // 初始化棋盘
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            board[i][j] = ' ';
        }
    }

    // 游戏开始
    printf("Welcome to Tic Tac Toe!\n");
    while (winner == 0 && !is_board_full()) {
        draw_board();
        printf("Player %d, enter a row (0-2): ", player);
        scanf("%d", &row);
        printf("Player %d, enter a column (0-2): ", player);
        scanf("%d", &col);

        if (board[row][col] != ' ') {
            printf("This cell is already occupied. Please try again.\n");
            continue;
        }

        if (player == 1) {
            board[row][col] = 'X';
        } else {
            board[row][col] = 'O';
        }

        winner = check_winner();
        if (winner == 1) {
            printf("Player 1 wins!\n");
        } else if (winner == 2) {
            printf("Player 2 wins!\n");
        }

        player = (player == 1) ? 2 : 1;
    }

    if (winner == 0) {
        printf("It's a tie!\n");
    }

    return 0;
}

void draw_board()
{
    printf(" %c | %c | %c \n", board[0][0], board[0][1], board[0][2]);
    printf("---+---+---\n");
    printf(" %c | %c | %c \n", board[1][0], board[1][1], board[1][2]);
    printf("---+---+---\n");
    printf(" %c | %c | %c \n", board[2][0], board[2][1], board[2][2]);
}

int check_winner()
{
    // 检查行
    for (int i = 0; i < 3; i++) {
        if (board[i][0] == board[i][1] && board[i][1] == board[i][2]) {
            if (board[i][0] == 'X') {
                return 1;
            } else if (board[i][0] == 'O') {
                return 2;
            }
        }
    }

    // 检查列
    for (int j = 0; j < 3; j++) {
        if (board[0][j] == board[1][j] && board[1][j] == board[2][j]) {
            if (board[0][j] == 'X') {
                return 1;
            } else if (board[0][j] == 'O') {
                return 2;
            }
        }
    }

    // 检查对角线
    if (board[0][0] == board[1][1] && board[1][1] == board[2][2]) {
        if (board[0][0] == 'X') {
            return 1;
        } else if (board[0][0] == 'O') {
            return 2;
        }
    }

    if (board[0][2] == board[1][1] && board[1][1] == board[2][0]) {
        if (board[0][2] == 'X') {
            return 1;
        } else if (board[0][2] == 'O') {
            return 2;
        }
    }

    return 0; // 没有胜者
}

int is_board_full()
{
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            if (board[i][j] == ' ') {
                return 0; // 棋盘未满
            }
        }
    }

    return 1; // 棋盘已满
}

这个程序实现了一个简单的井字棋游戏，玩家可以通过输入行和列来下棋，程序会检查胜者并输出结果。