三子棋分析与实现——C语言-创新互联

三子棋作为一款经典的小游戏，对于初学C语言的我们如果 可以熟练了解并可以实现其游戏功能，则对于以后更系统的学习C语言有很好帮助。下来我分享一下我在编程时的感悟和代码

首先介绍一下三子棋规则：只要将自己的棋连成一条线（行，列，斜线），即为赢
如图：
三子棋分析与实现——C语言

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先根据图和玩法大致有个思路：

1.我们可以将棋盘看做是一个三行三列的二维数组，且每行每列用线隔开以便区分
2.分为电脑下棋和玩家下棋（电脑先下和玩家先下）
3.判断输赢（玩家赢，电脑赢和平局）

大致思路即为上面分析，下面开始写代码：

创建tset.c，game.c和head.h三个文件

1.在test.c中编写主函数并写出游戏菜单

在这里我分为电脑先下和玩家先下，代码如下；

void menu()
{
    printf("***************************************\n");
    printf("*      1.play             0.exit      *\n");
    printf("***************************************\n");
}
void first_move()
{
    printf("***************************************\n");
    printf("*  1.computer first   2.player first  *\n");
    printf("***************************************\n");
}
void game()
{
   return 0；
}
int main()
{
    int choice;
    srand((unsigned int)time(NULL));//产生随机数
    do
    {
        menu();  
        printf("请选择:");
        scanf("%d", &choice);
        switch (choice)
        {
        case 1:
            game();
            break;
        case 0:
            break;
        default:
            printf("输入错误请重新输入.\n");
            break;
        }
    } while (choice);
    return 0;
}

2.下来逐步在game.c中实现所需功能并且在game函数中调用

先打印出棋盘，并将棋盘初始化为空格。代码如下；

void show_board(char board[ROWS][COLS], int rows, int cols)//打印棋盘
{
    int i;
    for (int i = 0; i < rows; i++)
    {
        printf("  %c | %c | %c  \n", board[i][0], board[i][1], board[i][2]);
        if (i != rows - 1)
            printf(" ---|---|--- \n");
    }
}

void init_board(char board[ROWS][COLS], int rows, int cols)//将数组初始化为空格
{
    int i, j;
    for (i = 0; i < rows; i++)
    {
        for (j = 0; j < cols; j++)
        {
            board[i][j] = ' ';
        }
    }
}

效果如图
三子棋分析与实现——C语言

3.编写玩家落子的代码

玩家数输入二维数组的坐标，这时需要判断玩家输入坐标是否合理以及在此坐标上是否有棋子，代码如下；

void player_move(char board[ROWS][COLS], int rows, int cols)//玩家落子
{
    int x, y;
    printf("玩家落子:\n");
   while (1)
    {
        scanf("%d %d", &x, &y);
        if (x >= 1 && x <= rows && y >= 1 && y <= cols)
        {
            if (board[x - 1][y - 1] == ' ')
            {
                board[x - 1][y - 1] = '*';
                break;
            }
            else printf("位置已被占用！请再试一次。\n");
        }
        else printf("输入错误!请重新输入.\n");
    }
}

4.玩成电脑落子

这里实现的是电脑在为空格的数组中随机落子。代码如下；

void computer_move(char board[ROWS][COLS], int rows, int cols)// 电脑落子
{

    int x, y;
    printf("电脑落子:\n");
   while (1)
    {
        x = rand() % rows;
        y = rand() % cols;
        if (board[x][y] == ' ')
        {
            board[x][y] = '#';
            break;
        }
    }
}

5.最后就只剩判断输赢

先讨论玩家或者电脑赢的情况；代码如下；

char check_win(char board[ROWS][COLS], int rows, int cols)//判断输赢
{
    int i;
    for (i = 0; i < rows; i++)
    {
        if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][1] != ' ')
            return board[i][1];
    }
    for (i = 0; i < cols; i++)
    {
        if (board[0][i] == board[1][i] && board[1][i] == board[2][i] && board[1][i] != ' ')
            return board[1][i];
    }
    if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[1][1] != ' ')
        return board[1][1];
    else if (board[2][0] == board[1][1] && board[1][1] == board[0][2] && board[1][1] != ' ')
        return board[1][1];
    else if (is_full(board, rows, cols))
        return 'q';
    return 0;
}

这是考虑是平局的情况，平局则为棋盘下满都没有输赢，可以遍历整个数组（棋盘）若没有空格就为平局。代码如下；

static int is_full(char board[ROWS][COLS], int rows, int cols)//检测是否为平局
{
    int i, j;
    for (i = 0; i < rows; i++)
    {
        for (j = 0; j < cols; j++)
        {
            if (board[i][j] == ' ')
                return 0;
        }
    }
    return 1;
}

初步测试结果如下

三子棋分析与实现——C语言

在图中我们可以看出电脑可以有赢的机会却在随机下子，这样的游戏是没有挑战的。因此应该修改下电脑下子的代码，使其智能化。我们可在电脑落子时判断如果有在同行，同列或者斜线上有相同棋子的，电脑则优先落子在其未成一条线的空格处，这样实现简单智能化

代码如下；

void computer_move(char board[ROWS][COLS], int rows, int cols)//智能化电脑落子
{
    int x, y, i;
    printf("电脑落子:\n");
   while (1)
    {
        x = rand() % rows;
        y = rand() % cols;
        for (i = 0; i < rows; i++)
        {
            if (board[i][0] == board[i][1] && board[i][0] == '#' && board[i][2] == ' ')
            {
                board[i][2] = '#';
                goto flag1;
            }
            else if (board[i][1] == board[i][2] && board[i][1] == '#' && board[i][0] == ' ')
            {
                board[i][0] = '#';
                goto flag1;
            }
            else if (board[i][0] == board[i][2] && board[i][2] == '#' && board[i][1] == ' ')
            {
                board[i][1] = '#';
                goto flag1;
            }
            else if (board[0][i] == board[1][i] && board[0][i] == '#' && board[2][i] == ' ')
            {
                board[2][i] = '#';
                goto flag1;
            }
            else if (board[1][i] == board[2][i] && board[1][i] == '#' && board[0][i] == ' ')
            {
                board[0][i] = '#';
                goto flag1;
            }
            else if (board[0][i] == board[2][i] && board[2][i] == '#' && board[1][i] == ' ')
            {
                board[1][i] = '#';
                goto flag1;
            }
            else if (board[0][0] == board[1][1] && board[0][0] == '#' && board[2][2] == ' ')
            {
                board[2][2] = '#';
                goto flag1;
            }
            else if (board[1][1] == board[2][2] && board[1][1] == '#' && board[0][0] == ' ')
            {
                board[0][0] = '#';
                goto flag1;
            }
            else if (board[0][0] == board[2][2] && board[0][0] == '#' && board[1][1] == ' ')
            {
                board[1][1] = '#';
                goto flag1;
            }
            else if (board[0][2] == board[1][1] && board[1][1] == '#' && board[2][0] == ' ')
            {
                board[2][0] = '#';
                goto flag1;
            }
            else if (board[1][1] == board[2][0] && board[1][1] == '#' && board[0][2] == ' ')
            {
                board[0][2] = '#';
                goto flag1;
            }
            else if (board[2][0] == board[0][2] && board[2][0] == '#' && board[1][1] == ' ')
            {
                board[1][1] = '#';
                goto flag1;
            }
        }
        for (i = 0; i < rows; i++)
        {
            if (board[i][0] == board[i][1] && board[i][0] == '*' && board[i][2] == ' ')
            {
                board[i][2] = '#';
                goto flag1;
            }
            else if (board[i][1] == board[i][2] && board[i][1] == '*' && board[i][0] == ' ')
            {
                board[i][0] = '#';
                goto flag1;
            }
            else if (board[i][0] == board[i][2] && board[i][2] == '*' && board[i][1] == ' ')
            {
                board[i][1] = '#';
                goto flag1;
            }
            else if (board[0][i] == board[1][i] && board[0][i] == '*' && board[2][i] == ' ')
            {
                board[2][i] = '#';
                goto flag1;
            }
            else if (board[1][i] == board[2][i] && board[1][i] == '*' && board[0][i] == ' ')
            {
                board[0][i] = '#';
                goto flag1;
            }
            else if (board[0][i] == board[2][i] && board[2][i] == '*' && board[1][i] == ' ')
            {
                board[1][i] = '#';
                goto flag1;
            }
            else if (board[0][0] == board[1][1] && board[0][0] == '*' && board[2][2] == ' ')
            {
                board[2][2] = '#';
                goto flag1;
            }
            else if (board[1][1] == board[2][2] && board[1][1] == '*' && board[0][0] == ' ')
            {
                board[0][0] = '#';
                goto flag1;
            }
            else if (board[0][0] == board[2][2] && board[0][0] == '*' && board[1][1] == ' ')
            {
                board[1][1] = '#';
                goto flag1;
            }
            else if (board[0][2] == board[1][1] && board[1][1] == '*' && board[2][0] == ' ')
            {
                board[2][0] = '#';
                goto flag1;
            }
            else if (board[1][1] == board[2][0] && board[1][1] == '*' && board[0][2] == ' ')
            {
                board[0][2] = '#';
                goto flag1;
            }
            else if (board[2][0] == board[0][2] && board[2][0] == '*' && board[1][1] == ' ')
            {
                board[1][1] = '#';
                goto flag1;
            }
        }
        if (board[x][y] == ' ')
        {
            board[x][y] = '#';
            goto flag1;
        }
    }
flag1:;
}

效果如图；
三子棋分析与实现——C语言

检测所有结果

电脑赢
三子棋分析与实现——C语言
玩家赢
三子棋分析与实现——C语言
平局
三子棋分析与实现——C语言

全部代码

tese.c

#define _CRT_SECURE_NO_WARNINGS 1
#include"head.h"
void menu()
{
    printf("***************************************\n");
    printf("*      1.play             0.exit      *\n");
    printf("***************************************\n");
}
void first_move()
{
    printf("***************************************\n");
    printf("*  1.computer first   2.player first  *\n");
    printf("***************************************\n");
}
void game()
{
    int choice, win;
    char board[ROWS][COLS];
    init_board(board, ROWS, COLS);
    first_move();
flag:
    printf("请选择");
    scanf("%d", &choice);
    switch (choice)
    {
    case 1: //电脑先落子
        do
        {
            computer_move(board, ROWS, COLS);   //电脑落子
            show_board(board, ROWS, COLS);      //打印棋盘
           win = check_win(board, ROWS, COLS); 
            if (win != 0)  //没赢
                break;
            player_move(board, ROWS, COLS);     //玩家落子
            show_board(board, ROWS, COLS);      // 打印棋盘
           win = check_win(board, ROWS, COLS);
        } while (win == 0);
        if (win == '#')
            printf("很遗憾，你输了!\n");
        if (win == '*')
            printf("恭喜，你赢了!\n");
        if (win == 'q')
            printf("平局\n");
        break;
    case 2: //玩家先落子
        show_board(board, ROWS, COLS);
        do
        {
            player_move(board, ROWS, COLS);
            show_board(board, ROWS, COLS);
           win = check_win(board, ROWS, COLS);
            if (win != 0)
                break;
            computer_move(board, ROWS, COLS);
            show_board(board, ROWS, COLS);
           win = check_win(board, ROWS, COLS);
        } while (win == 0);
        if (win == '#')
            printf("很遗憾，你输了!\n");
        if (win == '*')
            printf("恭喜，你赢了!\n");
        if (win == 'q')
            printf("平局\n");
        break;
    default:
        printf("输入错误，请重新输入\n");
        goto flag;
    }
}
int main()
{
    int choice;
    srand((unsigned int)time(NULL));//产生随机数
    do
    {
        menu();  
        printf("请选择:");
        scanf("%d", &choice);
        switch (choice)
        {
        case 1:
            game();
            break;
        case 0:
            break;
        default:
            printf("输入错误请重新输入.\n");
            break;
        }
    } while (choice);
    return 0;
}

game.c

#define _CRT_SECURE_NO_WARNINGS 1
#include"head.h"

void show_board(char board[ROWS][COLS], int rows, int cols)//打印棋盘
{
    int i;
    for (int i = 0; i < rows; i++)
    {
        printf("  %c | %c | %c  \n", board[i][0], board[i][1], board[i][2]);
        if (i != rows - 1)
            printf(" ---|---|--- \n");
    }
}

void init_board(char board[ROWS][COLS], int rows, int cols)//将数组初始化为空格
{
    int i, j;
    for (i = 0; i < rows; i++)
    {
        for (j = 0; j < cols; j++)
        {
            board[i][j] = ' ';
        }
    }
}

//void computer_move(char board[ROWS][COLS], int rows, int cols)// 电脑落子
//{
//
//  int x, y;
//  printf("电脑落子:\n");
// while (1)
//  {
//      x = rand() % rows;
//      y = rand() % cols;
//      if (board[x][y] == ' ')
//      {
//          board[x][y] = '#';
//          break;
//      }
//  }
//}
void computer_move(char board[ROWS][COLS], int rows, int cols)//智能化电脑落子
{
    int x, y, i;
    printf("电脑落子:\n");
   while (1)
    {
        x = rand() % rows;
        y = rand() % cols;
        for (i = 0; i < rows; i++)
        {
            if (board[i][0] == board[i][1] && board[i][0] == '#' && board[i][2] == ' ')
            {
                board[i][2] = '#';
                goto flag1;
            }
            else if (board[i][1] == board[i][2] && board[i][1] == '#' && board[i][0] == ' ')
            {
                board[i][0] = '#';
                goto flag1;
            }
            else if (board[i][0] == board[i][2] && board[i][2] == '#' && board[i][1] == ' ')
            {
                board[i][1] = '#';
                goto flag1;
            }
            else if (board[0][i] == board[1][i] && board[0][i] == '#' && board[2][i] == ' ')
            {
                board[2][i] = '#';
                goto flag1;
            }
            else if (board[1][i] == board[2][i] && board[1][i] == '#' && board[0][i] == ' ')
            {
                board[0][i] = '#';
                goto flag1;
            }
            else if (board[0][i] == board[2][i] && board[2][i] == '#' && board[1][i] == ' ')
            {
                board[1][i] = '#';
                goto flag1;
            }
            else if (board[0][0] == board[1][1] && board[0][0] == '#' && board[2][2] == ' ')
            {
                board[2][2] = '#';
                goto flag1;
            }
            else if (board[1][1] == board[2][2] && board[1][1] == '#' && board[0][0] == ' ')
            {
                board[0][0] = '#';
                goto flag1;
            }
            else if (board[0][0] == board[2][2] && board[0][0] == '#' && board[1][1] == ' ')
            {
                board[1][1] = '#';
                goto flag1;
            }
            else if (board[0][2] == board[1][1] && board[1][1] == '#' && board[2][0] == ' ')
            {
                board[2][0] = '#';
                goto flag1;
            }
            else if (board[1][1] == board[2][0] && board[1][1] == '#' && board[0][2] == ' ')
            {
                board[0][2] = '#';
                goto flag1;
            }
            else if (board[2][0] == board[0][2] && board[2][0] == '#' && board[1][1] == ' ')
            {
                board[1][1] = '#';
                goto flag1;
            }
        }
        for (i = 0; i < rows; i++)
        {
            if (board[i][0] == board[i][1] && board[i][0] == '*' && board[i][2] == ' ')
            {
                board[i][2] = '#';
                goto flag1;
            }
            else if (board[i][1] == board[i][2] && board[i][1] == '*' && board[i][0] == ' ')
            {
                board[i][0] = '#';
                goto flag1;
            }
            else if (board[i][0] == board[i][2] && board[i][2] == '*' && board[i][1] == ' ')
            {
                board[i][1] = '#';
                goto flag1;
            }
            else if (board[0][i] == board[1][i] && board[0][i] == '*' && board[2][i] == ' ')
            {
                board[2][i] = '#';
                goto flag1;
            }
            else if (board[1][i] == board[2][i] && board[1][i] == '*' && board[0][i] == ' ')
            {
                board[0][i] = '#';
                goto flag1;
            }
            else if (board[0][i] == board[2][i] && board[2][i] == '*' && board[1][i] == ' ')
            {
                board[1][i] = '#';
                goto flag1;
            }
            else if (board[0][0] == board[1][1] && board[0][0] == '*' && board[2][2] == ' ')
            {
                board[2][2] = '#';
                goto flag1;
            }
            else if (board[1][1] == board[2][2] && board[1][1] == '*' && board[0][0] == ' ')
            {
                board[0][0] = '#';
                goto flag1;
            }
            else if (board[0][0] == board[2][2] && board[0][0] == '*' && board[1][1] == ' ')
            {
                board[1][1] = '#';
                goto flag1;
            }
            else if (board[0][2] == board[1][1] && board[1][1] == '*' && board[2][0] == ' ')
            {
                board[2][0] = '#';
                goto flag1;
            }
            else if (board[1][1] == board[2][0] && board[1][1] == '*' && board[0][2] == ' ')
            {
                board[0][2] = '#';
                goto flag1;
            }
            else if (board[2][0] == board[0][2] && board[2][0] == '*' && board[1][1] == ' ')
            {
                board[1][1] = '#';
                goto flag1;
            }
        }
        if (board[x][y] == ' ')
        {
            board[x][y] = '#';
            goto flag1;
        }
    }
flag1:;
}

void player_move(char board[ROWS][COLS], int rows, int cols)//玩家落子
{
    int x, y;
    printf("玩家落子:\n");
   while (1)
    {
        scanf("%d %d", &x, &y);
        if (x >= 1 && x <= rows && y >= 1 && y <= cols)
        {
            if (board[x - 1][y - 1] == ' ')
            {
                board[x - 1][y - 1] = '*';
                break;
            }
            else printf("位置已被占用！请再试一次。\n");
        }
        else printf("输入错误!请重新输入.\n");
    }
}

static int is_full(char board[ROWS][COLS], int rows, int cols)//检测是否为平局
{
    int i, j;
    for (i = 0; i < rows; i++)
    {
        for (j = 0; j < cols; j++)
        {
            if (board[i][j] == ' ')
                return 0;
        }
    }
    return 1;
}

char check_win(char board[ROWS][COLS], int rows, int cols)//判断输赢
{
    int i;
    for (i = 0; i < rows; i++)
    {
        if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][1] != ' ')
            return board[i][1];
    }
    for (i = 0; i < cols; i++)
    {
        if (board[0][i] == board[1][i] && board[1][i] == board[2][i] && board[1][i] != ' ')
            return board[1][i];
    }
    if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[1][1] != ' ')
        return board[1][1];
    else if (board[2][0] == board[1][1] && board[1][1] == board[0][2] && board[1][1] != ' ')
        return board[1][1];
    else if (is_full(board, rows, cols))
        return 'q';
    return 0;
}

head.h

#include
#include
#include

#define ROWS 3
#define COLS 3

void show_board(char board[ROWS][COLS], int rows, int cols);//打印棋盘
void init_board(char board[ROWS][COLS], int rows, int cols);//初始化棋盘为空格
void computer_move(char board[ROWS][COLS], int rows, int cols);//电脑落子
void player_move(char board[ROWS][COLS], int rows, int cols);//玩家落子
char check_win(char board[ROWS][COLS], int rows, int cols);//判断输赢

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