效果如下：

代碼實作：

頭檔案部分

#pragma once
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define ROW 3
#define COL 3

//函式宣告
void Initboard(char board[ROW][COL], int row, int col);
void Displayboard(char board[ROW][COL], int row, int col);
Player(char board[ROW][COL], int row, int col);
Computer(char board[ROW][COL], int row, int col);
char Judge(char board[ROW][COL], int row, int col);

函式部分

#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] = ' ';
}
//棋盤
// x | x | x 
//---|---|---
// x | x | x 
//---|---|---
// x | x | x 
void Displayboard(char board[ROW][COL], int row, int col)
{
	int i = 0;
	int j = 0;
	for (i = 0; i < row; i++)
	{
		//列印一行資料
		for (j = 0; j < col; j++)
		{
			printf(" %c ", board[i][j]);
			if (j < col - 1)
				printf("|");
		}
		printf("\n");
		//列印分隔行
		if(i<row-1)
			for (j = 0; j < col; j++)
			{
				printf("---");
				if (j < col - 1)
					printf("|");
			}
		printf("\n");
	}
}
 Player(char board[ROW][COL], int row, int col)
{
	while (1)
	{
		int x = 0;
		int y = 0;
		printf("請輸入你的棋子坐標（如第一行第一列為1 1）：\n");
		scanf("%d%d", &x, &y);
		if (x <= row  && x >= 1 && y <= col && y >= 1)
		{
			if (board[x - 1][y - 1] == ' ')
			{
				board[x - 1][y - 1] = '*';
				break;
			}
			else
			{
				printf("該處已有棋子，請重新輸入\n");
				continue;
			}
		}
		else
			printf("坐標范圍錯誤,請重新輸入");
	}
}
 Computer(char board[ROW][COL], int row, int col)
 {
	 int x = 0;
	 int y = 0;
	 while (1)
	 {
		 x = rand() % ROW;
		 y = rand() % COL;
		 if (board[x][y] == ' ')
		 {
			 board[x][y] = '#';
			 break;
		 }
	 }
 }
 int IsFull(char board[ROW][COL], int row, int col)//回傳1表示棋盤已滿，0表示棋盤沒滿
 {
	 int i, j;
	 for (i = 0; i < row; i++)
	 {
		 for (j = 0; j < col; j++)
			 if (board[i][j] == ' ')
				 return 0;
	 } 
	 return 1;
 }

 char Judge(char board[ROW][COL], int row,int col)
 {
	 int i = 0;
	 //行有三個相連的情況
	 for (i = 0; i < row; i++)
	 {
		 if (board[i][0] == board[i][1] && board[i][1]==
			 board[i][2] && board[i][0] != ' ')
			 return board[i][0];
	 }
	 //列有三個相連的情況
	 for (i = 0; i < col; i++)
	 {
		 if (board[0][i] == board[1][i] && board[1][i]==
			 board[2][i] && board[0][i] != ' ')
			 return board[0][i];
	 }
	 //對角線三個相連的情況
	 if (board[0][0] == board[1][1]&& board[1][1]==board[2][2]&&board[0][0]!=' '
		 || board[0][2] == board[1][1]&&board[1][1] == board[2][0]&&board[0][2] != ' ')
		 return board[1][1];
	 //平局的情況（棋盤滿了）
	 if  (IsFull( board , ROW,COL) ==1)
	 {
		 return 'E';
	 }
	 return 'C';
 }

主函式部分

#include "game.h"

void menu()
{
	printf("***************************\n");
	printf("***1.開始游戲 0.退出游戲***\n");
	printf("***************************\n");
	printf("請輸入數字1或0:");
}
void game()
{
	char r;
	char board[ROW][COL] = { 0 };
	//初始化棋盤（清空棋盤）
	Initboard(board, ROW, COL);
	//列印棋盤
	Displayboard(board, ROW, COL);
	//人機對弈
	while (1)
	{
		Player(board, ROW, COL);
		Displayboard(board, ROW, COL);
		r = Judge(board, ROW, COL);
		if (r != 'C')
			break;
		Computer(board, ROW, COL);
		Displayboard(board, ROW, COL);
		r = Judge(board, ROW, COL);
		if (r != 'C')
			break;
	}
	//判斷輸贏
	if (r == '*')
	{
		printf("玩家贏\n");
	}
	else if (r == '#')
	{
		printf("電腦贏\n");
	}
	else if (r == 'E')
	{
		printf("平局\n");
	}
}
int main()
{
	srand((unsigned int)time(NULL));
	int input = 0;
	do
	{
		menu();
		scanf("%d", &input);
		switch (input)
		{
		case 1:
			printf("開始游戲\n");
			game();
			break;
		case 0:
			printf("退出游戲\n");
			break;
		default:
			printf("請輸入正確的選項\n");
			break;
		}
	} while (input);
	printf("游戲結束！");
	return 0;
}

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