硬控我一上午，小编还是太菜了，大家可以自行升级电脑难度，也可以升级游戏到五子棋

1.game.h

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

//初始化棋盘
void InitBoard(char board[ROW][COL], int row, int col);
//打印棋盘
void DispalyBoard(char board[ROW][COL], int row, int col);
//玩家下棋
void PlayerMove(char board[ROW][COL], int row, int col);
//电脑下棋
void ComputerMove(char board[ROW][COL], int row, int col);
//判断输赢
char IfWin(char board[ROW][COL], int row, int col);
int IfFull(char board[ROW][COL], int row, int col);

2.test.c

#define _CRT_SECURE_NO_WARNINGS
#include "game.h"
void menu()
	{
		printf("****************************\n");
		printf("****** 1.play 0.exist ******\n");
		printf("****************************\n");
	}
void game()
{
	char ret='C';
	char board[ROW][COL] = { 0 };
	//初始化棋盘的函数
	InitBoard(board,ROW,COL);
	DispalyBoard(board,ROW,COL);
	while (1)
	{
		PlayerMove(board,ROW,COL);
		ret=IfWin(board,ROW,COL);
		if (ret != 'C')
	      {
		 	break;
		  }
		DispalyBoard(board,ROW,COL);
		ComputerMove(board,ROW,COL);
		ret=IfWin(board,ROW,COL);
		if (ret != 'C')
		{
			break;
		}
		DispalyBoard(board,ROW,COL); 

	
	
	}

if (ret == '*')
	{
		printf("玩家赢\n");
	}		
	if (ret == '#')
	{
		printf("电脑赢\n");
	}
	if (ret == 'Q')
	{
		printf("平局\n");
	}
	

}

int main()
{
	int input = 0;
do
	{
	menu();//菜单
	printf("请选择:>");
	scanf("%d", &input);
	switch (input)
	{
	case 1:
		printf("三子棋\n");
		game();
		break;
	case 0:
		printf("退出游戏\n");
		break;
	default:
		printf("选择错误\n");
		break;
	}
} while (input);
return 0;

}

3.game.c

#define _CRT_SECURE_NO_WARNINGS
#include "game.h"
int IfFull(char board[ROW][COL],int row,int col)
{
	for (int i = 0;i < row;i++)
	{
		for (int j = 0;j < col;j++)
		{
			if (board[i][j] == ' ')
			{
				return 0;
			}
		}
	}
	return 1;
}
void InitBoard(char board[ROW][COL], int row, int col)
{

	for (int i = 0;i < row;i++)
	{
		for (int j = 0;j < col;j++)
		{
			board[i][j] = ' ';
		}
	}
}

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

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

		if (i < row - 1)
		{
			for (int 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, y = 0;
	 printf("玩家下棋:>\n");
	 while (1)
	 {
		
		 printf("请输入坐标:>");
		 scanf("%d %d", &x,&y);
		 if (x >= 1 && x <= row && y >= 1 && y <= col)
		 {
			 if (board[x - 1][y - 1] == ' ')
			 {
				 board[x - 1][y - 1] = '*';
				 break;
			 }
			 else
			 {
				 printf("坐标被占用，请选择其他位置\n");
			 }
		 }
		 else
		 {
			 printf("坐标非法，请重新输入\n");
		 }
	 }


}
 
void ComputerMove(char board[ROW][COL], int row, int col)
{
	srand((unsigned int)time(NULL));
	 printf("电脑下棋\n");
	 int x = 0, y = 0;
	 while(1)
	 {
		int  x = rand() % row;
		int  y = rand() % col;
		 if (board[x][y] == ' ')
		 {
			 board[x][y] = '#';
			 break;
		 }
	 }
 }

char IfWin(char board[ROW][COL], int row, int col)
{
	//行
	for (int i = 0;i < row;i++)
	{
		if (board[i][0] == board[i][1] && board[i][2] == board[i][1] && board[i][1] != ' ')
		{
			return board[i][0];
		}
	}
	//列
	
	for (int j = 0;j< col;j++)
	{
		if (board[0][j] == board[1][j] && board[1][j] == board[2][j] && board[1][j] !=' ')
		{
			return board[0][j];
		}
	}
	//对角线
	if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[1][1] != ' ')
	{
		return board[0][0];
	}
	if (board[0][2] == board[1][1] && board[1][1] == board[2][0] && board[1][1] != ' ')
	{
		return board[1][1];
	}


	if (IfFull(board, row, col))
	{
		return 'Q';
	}
	return 'C';
}