#pragma once

#define _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define ROW 3//定義棋盤長寬為 3
#define COL 3

void menu();

void game();

void Initboard(char board[ROW][COL], int row, int col);//初始化棋盤 棋子位置都為空格

void DisplayBoard(char board[ROW][COL],int row,int col);//打印棋盤

void PlayerMove(char board[ROW][COL],int row,int col);//玩家下棋

void ComputerMove(char board[ROW][COL],int row,int col);//電腦下棋

int IsWin(char board[ROW][COL], int row, int col);//判斷輸贏

void menu()
{//打印菜單界面
	printf("*********************************\n");
	printf("**********   1.play    **********\n");
	printf("**********   0.exit    **********\n");
	printf("*********************************\n");
}

void game()
{
	//游戲過程

	char board[ROW][COL];//創(chuàng)建棋盤數(shù)組
	Initboard(board, ROW, COL);//初始化棋盤 棋子位置都為空格
	DisplayBoard(board, ROW, COL);//打印棋盤
	//下棋
	char ret = 0;
	while (1)
	{
		PlayerMove(board, ROW, COL);//玩家下棋
		DisplayBoard(board, ROW, COL);//打印棋盤
		ret = IsWin(board, ROW, COL);//判斷輸贏
		if (ret != 'C')
		{
			break;
		}
		ComputerMove(board, ROW, COL);//電腦下棋
		DisplayBoard(board, ROW, COL);//打印棋盤
		ret = IsWin(board, ROW, COL);//判斷輸贏
		if (ret != 'C')
		{
			break;
		}
	}
	if (ret == '*')
	{
		printf("玩家贏\n");
	}
	else if (ret == '#')
	{
		printf("電腦贏\n");
	}
	else
	{
		printf("平局\n");
	}
}//我們在這里判斷輸贏函數(shù)返回四種狀態(tài)
//返回‘C'繼續(xù)下棋循環(huán)，返回‘*'玩家贏，返回‘#'電腦贏，返回‘P'平局
//平局判定還需要判斷棋盤是否下滿，后面說。

int main()
{
	char input = 0;//定義菜單選擇值
	do
	{
		menu();//打印菜單
		printf("請選擇>");
		scanf("%c", &input);//獲取選擇值
		switch(input)
		{
			case '1'://開始游戲
				printf("三子棋\n");
				getchar();//清除緩存區(qū)
				game();//游戲過程
				break;
			case '0'://退出游戲
				getchar();
				printf("退出游戲\n");
				break;
			default://輸入其他東西時
				getchar();
				printf("輸入錯誤\n");
				break;

		}
	} while (input!='0');//非0數(shù)字為真 0為假
	
	return 0;
}

void DisplayBoard(char board[ROW][COL], int row, int col)//打印棋盤
{
	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)//玩家下棋
{
	printf("玩家走:>\n");
	int x = 0;
	int y = 0;
	while (1)
	{
		printf("請輸入坐標>：");//玩家輸入1~ROW；1~COL對應數(shù)組底標row-1；col-1
		scanf("%d %d", &x, &y);
		getchar();
		if (((x >= 1) && (x <= row)) && ((y >= 1) && (y <= col)))
		{
			if (board[x-1][y-1]==' ')
			{
				board[x - 1][y - 1] = '*';
				break;
			}
			else
			{
				printf("該位置已有棋子,請重新輸入\n");
			}
		}
		else
		{
			printf("輸入錯誤，請重新輸入\n");
		}
	}

}

void ComputerMove(char board[ROW][COL], int row, int col)//電腦下棋
{
	printf("電腦走:>\n");
	int x = 0;
	int y = 0;
	srand((unsigned int)time(NULL));
	while (1)
	{
		//電腦隨機生成坐標
		x = rand() % row;
		y = rand() % col;

		if (board[x][y] == ' ')
			{
				board[x][y] = '#';
				break;
			}
		else
			{
				//該位置已有棋子,重新生成
			}
	}
}

int IsWin(char board[ROW][COL], int row, int col)//判斷輸贏
{
	//返回四種情況
	//判斷行
	int i = 0;
	for (i = 0; i < row; i++)
	{
		if ((board[i][0] == board[i][1]) && (board[i][1] == board[i][2])&&(board[i][2]!=' '))
		{
			return board[i][0];
		}
	}
	//判斷列
	for (i = 0; i < row; i++)
	{
		if ((board[0][i] == board[1][i]) && (board[1][i] == board[2][i]) && (board[2][i] != ' '))
		{
			return board[0][i];
		}
	}
	//判斷對角線
	if ((board[0][0] == board[1][1]) && (board[1][1] == board[2][2]) && (board[2][2] != ' '))
	{
		return board[1][1];
	}
	if ((board[0][2] == board[1][1]) && (board[1][1] == board[2][0]) && (board[2][0] != ' '))
	{
		return board[1][1];
	}
	if (IsFull(board, row, col))//如果棋盤滿了還未分出勝負，那么久平局
	{
		return 'P';
	}
	return 'C';

}

int IsFull(char board[ROW][COL],int row,int col)//判斷棋盤是否滿了
{ 
	int i = 0;
	for (i = 0; i < row; i++)
	{
		int j = 0;
		for (j = 0; j < col; j++)
		{
			if (board[i][j] == ' ')
				return 0;
		}
	}
	return 1;
}