#include <stdio.h>
#include <stdlib.h>

int  store[]={'_','_','_','_','_','_','_','_','_'}, shunt=1, count, i;

void print_map()
{
	char boundary='|';
	getchar();
	system("cls");
	for(i=0;i<9;i++)
	{
		printf("%c%c",boundary,store[i]);
		if(i==2||i==5)
		{
			putchar(boundary);
			putchar('\n');
		}
	}
	putchar(boundary);
	putchar('\n');
}

int judge_win(int f=0)
{
	if(store[0]+store[1]+store[2]==3*'O'||store[0]+store[1]+store[2]==3*'X'||
		store[3]+store[4]+store[5]==3*'O'||store[3]+store[4]+store[5]==3*'X'||
		store[6]+store[7]+store[8]==3*'O'||store[6]+store[7]+store[8]==3*'X'||
		store[0]+store[3]+store[6]==3*'O'||store[0]+store[3]+store[6]==3*'X'||
		store[1]+store[4]+store[7]==3*'O'||store[1]+store[4]+store[7]==3*'X'||
		store[2]+store[5]+store[8]==3*'O'||store[2]+store[5]+store[8]==3*'X'||
		store[0]+store[4]+store[8]==3*'O'||store[0]+store[4]+store[8]==3*'X'||
		store[2]+store[4]+store[6]==3*'O'||store[2]+store[4]+store[6]==3*'X')
		f=1;
	return f;
}

void judge_final()
{
    if(count%2==0) printf("二號選手獲勝\n");
	else printf("一號選手獲勝\n");
}

int number_mend(int number)
{
	switch(number)
	{
	case 1:number=7;break;
	case 2:number=8;break;
	case 3:number=9;break;
	case 7:number=1;break;
	case 8:number=2;break;
	case 9:number=3;break;
	default:;
	}
	return number;
}

void scan_number()
{
	int a, b, number;
	scanf("%d",&number);
	number=number_mend(number);
	while(number<1||number>9||store[number-1]!='_')
	{
		printf("非法輸入，請重新輸入\n");
		getchar();
		scanf("%d",&number);
		number=number_mend(number);
	}
	if(shunt%2!=0)
	{
		a=number;
		store[a-1]='O';
		print_map();
		shunt++;
	}
	else
	{
		b=number;
		store[b-1]='X';
		print_map();
		shunt++;
	}
}

void renew()
{
	for(;i>=0;i--)
		store[i]='_';
}

int main()
{
	char turn;
	printf("這是一個井字棋遊戲，小鍵盤1到9對應九個格。按回車開始遊戲\n");
	for(turn='y';turn=='y';turn=getchar(),renew())
	{
		print_map();
		for(count=0;count<10;count++)
		{
			if(judge_win())break;
			if(count==9)
			{
				printf("平局\n");
				goto lp;
			}
			scan_number();
		}
		judge_final();
lp:printf("是否繼續？y/n\n");
	}
	printf("遊戲結束\n");
	return 0;
}