C语言实战：使用二维数组实现三子棋游戏

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<time.h>

// 定义棋盘大小
#define ROW 3
#define COL 3

// 全局函数声明
void InitBoard(char board[ROW][COL], int row, int col);
void PrintBoard(char board[ROW][COL], int row, int col);
void PlayerMove(char board[ROW][COL], int row, int col);
void ComputerMove(char board[ROW][COL], int row, int col);
int CheckBoard(char board[ROW][COL], int row, int col);
void menu();

// 初始化棋盘
void InitBoard(char board[ROW][COL], int row, int col)
{
    int i = 0;
    for (i = 0; i < row; i++)
    {
        int j = 0;
        for (j = 0; j < col; j++)
        {
            board[i][j] = ' ';
        }
    }
}

// 打印棋盘
void PrintBoard(char board[ROW][COL], int row, int col)
{
    int i = 0;
    for (i = 0; i < row; i++)
    {
        // 打印数据行
        int j = 0;
        for (j = 0; j < col; j++)
        {
            if (j == col - 1)
            {
                printf(" %c ", board[i][j]);
            }
            else
            {
                printf(" %c |", board[i][j]);
            }
        }
        printf("\n");
        // 打印分割行
        if (i < row - 1)
        {
            for (j = 0; j < col; j++)
            {
                if (j == col - 1)
                {
                    printf("---");
                }
                else
                {
                    printf("---|");
                }
            }
            printf("\n");
        }
    }
}

// 玩家走棋
void PlayerMove(char board[ROW][COL], int row, int col)
{
    int x = 0, y = 0;
    while (1)
    {
        printf("请输入坐标(如 1 1): ");
        scanf("%d %d", &x, &y);
        // 坐标范围检测
        if (x >= 1 && x <= row && y >= 1 && y <= col)
        {
            // 内存检测
            if (board[x - 1][y - 1] == ' ')
            {
                board[x - 1][y - 1] = '*';
                return;
            }
            else
            {
                printf("该位置已有棋子，请重新输入！\n");
            }
        }
        else
        {
            printf("坐标越界，请重新输入！\n");
        }
    }
}

// 电脑走棋
void ComputerMove(char board[ROW][COL], int row, int col)
{
    int x = 0, y = 0;
    printf("电脑思考中...\n");
    while (1)
    {
        x = rand() % row;
        y = rand() % col;
        if (board[x][y] == ' ')
        {
            board[x][y] = '#';
            break;
        }
    }
}

// 检查棋盘状态
// 1:玩家赢 *  2:电脑赢 #  3:继续  0:平局
int CheckBoard(char board[ROW][COL], int row, int col)
{
    int i = 0;
    // 判断行和列
    for (i = 0; i < row; i++)
    {
        // 行判断
        if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][0] != ' ')
        {
            return (board[i][0] == '*') ? 1 : 2;
        }
        // 列判断
        if (board[0][i] == board[1][i] && board[1][i] == board[2][i] && board[0][i] != ' ')
        {
            return (board[0][i] == '*') ? 1 : 2;
        }
    }
    // 对角线判断
    if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[0][0] != ' ')
    {
        return (board[0][0] == '*') ? 1 : 2;
    }
    if (board[0][2] == board[1][1] && board[1][1] == board[2][0] && board[0][2] != ' ')
    {
        return (board[0][2] == '*') ? 1 : 2;
    }
    // 判断平局
    for (i = 0; i < row; i++)
    {
        int j = 0;
        for (j = 0; j < col; j++)
        {
            if (board[i][j] == ' ')
            {
                return 3; // 还有空位，继续
            }
        }
    }
    return 0; // 平局
}

// 游戏主逻辑
void game()
{
    char board[ROW][COL];
    int ret = 0;
    
    // 1. 初始化
    InitBoard(board, ROW, COL);
    // 2. 打印初始界面
    PrintBoard(board, ROW, COL);
    
    // 3. 循环下棋
    while (1)
    {
        // 玩家回合
        PlayerMove(board, ROW, COL);
        PrintBoard(board, ROW, COL);
        ret = CheckBoard(board, ROW, COL);
        if (ret != 3) break;
        
        // 电脑回合
        system("cls");
        ComputerMove(board, ROW, COL);
        PrintBoard(board, ROW, COL);
        ret = CheckBoard(board, ROW, COL);
        if (ret != 3) break;
    }
    
    // 4. 输出结果
    if (ret == 1)
    {
        printf("*** 玩家赢了 ***\n");
    }
    else if (ret == 2)
    {
        printf("*** 电脑赢了 ***\n");
    }
    else if (ret == 0)
    {
        printf("*** 平局 ***\n");
    }
}

// 菜单显示
void menu()
{
    printf("=================================\n");
    printf("=======  1. Play Game  ========\n");
    printf("=======  0. Exit Game   ========\n");
    printf("=================================\n");
}

// 主程序
int main()
{
    srand((unsigned)time(NULL));
    int input = 1;
    while(input)
    {
        menu();
        printf("请选择: ");
        scanf("%d", &input);
        switch(input)
        {
            case 1:
                game();
                break;
            case 0:
                printf("退出游戏\n");
                break;
            default:
                printf("选择错误，请重新输入\n");
                break;
        }
    }
    return 0;
}