具体的实现代码

game.c

#include "game.h"

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

void DisplayBoard(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++) {
            printf("%c", board[i][j]);
            if (j < col - 1)
                printf("|");
        }
        printf("\n");
        if (i < row - 1) {
            for (j = 0; j < col; j++) {
                printf("---");
                if (j < col - 1)
                    printf("|");
            }
            printf("\n");
        }
    }
}

void PlayerMove(char board[ROW][COL], int row, int col) {
    int x = 0;
    int y = 0;
    printf("玩家走：>");
    while (1) {
        printf("请输入要下的坐标：>");
        scanf("%d%d", &x, &y);
        if (x > 0 && x <= row && y > 0 && y <= col) {
            if (board[x - 1][y - 1] == ' ') {
                board[x - 1][y - 1] = '*';
                break;
            } else {
                printf("该坐标被占用");
            }
        } else {
            printf("坐标非法，请重新输入！");
        }
    }
}

void ComputerMove(char board[ROW][COL], int row, int col) {
    int x = 0;
    int y = 0;
    printf("电脑走：>");
    while (1) {
        x = rand() % row;
        y = rand() % col;
        if (board[x][y] == ' ') {
            board[x][y] = '#';
			break;
		}
	}

}
//返回1表示棋盘满了
//返回0表示棋盘没满
int IsFull(char board[ROW][COL],int row,int col)
{
	int i=0;
	int j=0;
	for(i=0;i<row;i++){
		for(j=0;j<col;j++)
		{
			if(board[i][j]==' ')
			{
			return 0;//没满
			}

		}
		
	}
	return 1;//满了
}

char IsWin(char board[ROW][COL], int row, int col)
{
    int i = 0;
    // 横三行
    for (i = 0; i < row; i++) {
        if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][1] != ' ') {
            return board[i][1];
        }
    }
    // 竖三列
    for (i = 0; i < col; i++) {
        if (board[0][i] == board[1][i] && board[1][i] == board[2][i] && board[1][i] != ' ') {
            return board[1][i];
        }
    }
    // 两个对角线
    if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[1][1] != ' ') {
        return board[1][1];
    }
    if (board[2][0] == board[1][1] && board[1][1] == board[0][2] && board[1][1] != ' ') {
        return board[1][1];
    }
    // 判断是否平局
    if (1==IsFull(board, ROW, COL)) {
        return 'Q'; // Q表示平局，可以根据需要修改为其他字符或者字符串
    }
    return 'C'; // C表示游戏未结束，可以根据需要修改为其他字符或者字符串
}

 test.c

#include "game.h"
void menu()
{
    printf("**********************");
    printf("***1.play  0.exit*****");
    printf("**********************");
}

//游戏的整个算法实现
void game()

{    char ret=0;
    //数组用来存放走出的棋盘信息
    char board[ROW][COL] = {0}; //全部空格
    //初始化棋盘
    InitBoard(board, ROW, COL);
    //打印棋盘
    DisplayBoard(board, ROW, COL);
    //下棋
    while (1)
    {
		 
        //玩家下棋
        PlayerMove(board, ROW, COL);
        DisplayBoard(board, ROW, COL);
        //判断玩家是否赢
       ret=IsWin(board,ROW,COL);
        if (ret != 'C')
        {
            break;
        }
        //电脑下棋
        ComputerMove(board, ROW, COL);
        DisplayBoard(board, ROW, COL);
        //判断电脑是否赢
        ret = IsWin(board, ROW, COL);
        if (ret != 'C'){
            break;
        }
	}
		if (ret == '*')
		{
        printf("玩家赢\n");
		}
		else if (ret == '#')
		{
        printf("电脑赢\n");
    }
		else{
        printf("平局\n");
		}
}
    
void test()
{
    int input = 0;
    srand((unsigned int)time(NULL)); // 随机数种子初始化，放在test函数中更合适，避免多次调用test时重复初始化种子。如果不需要每次运行时都生成不同的随机序列，可以将其移到main函数中。
    do {
        menu();
        printf("请选择：>");
        scanf("%d", &input);
        switch (input) {
            case 1: {
                game();
                break; }
            case 0: {
                printf("退出游戏");  break;
					}
            default: 
				{ printf("选择错误，请重新选择！");
				break;}
 }
 } while (input);
																																																								   
} void main(){
	test(); 
	return 0;
 }

game.h

#define ROW 3
#define COL 3
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
//声明
void InitBoard(char board[ROW][COL],int row,int col);
void DisplayBoard(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);

//告诉我们四种状态
//玩家赢'*'
//电脑赢'#'
//平局'Q'
//继续'C'
char IsWin(char board[ROW][COL],int row,int col);