#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define ROW 3
#define COL 3

void init_board(char arr[ROW][COL])
{
  int i=0;
  int j=0;
  for (i = 0; i < ROW; i++)
  {
    for (j = 0; j < COL; j++)
    {
      arr[i][j] = ' ';
    }
  }
}
void display_board(char arr[ROW][COL])
{
  int i = 0;
  for (i = 0; i < ROW; i++)
  {
    printf(" %c|%c |%c\n", arr[i][0], arr[i][1], arr[i][2]);
    if (i < 2)
    {
      printf("--|--|--");
    }
    printf("\n");
  }

}
void player_chess(char arr[ROW][COL])
{
  int x = 0;
  int y = 0;
  while (1)
  {
    printf("請(qǐng)輸入你所要下棋的方位：");
    scanf("%d%d", &x, &y);
    x--;
    y--;
    if (arr[x][y] == ' ')
    {
      arr[x][y] = '#';
      break;
    }
    else
    {
      printf("這個(gè)位置已經(jīng)被占，請(qǐng)重新下棋。\n");
      continue;
    }
  }
}
void computer_chess(char arr[ROW][COL])
{
  srand((unsigned)time(NULL));
  while (1)
  {
    int x = 0;
    int y = 0;
    srand((unsigned)time(NULL));
    x = rand() % 3;
    y = rand() % 3;
    if (arr[x][y] == ' ')
    {
      arr[x][y] = '@';
      break;
    }
    else
    {
      if (check_full(arr) == 0)
      {
        continue;
      }
      else
      {
        break;
      }
    }
  }
}


int check_full(char arr[ROW][COL])
{
  int i = 0;
  int j = 0;
  for (i = 0; i < ROW; i++)
  {
    for (j = 0; j < COL; j++)
    {
      if (arr[i][j] == ' ')
      {
        return 0;
      }
    }
  }
  return 1;
}
char check_win(char arr[ROW][COL])
{
  int i = 0;
  int ret = 0;

  for (i = 0; i < ROW; i++)
  {
    if ((arr[i][0] == arr[i][1]) && (arr[i][2] == arr[i][1]))
    {
      return arr[i][0];
    }
  }
  for (i = 0; i < COL; i++)
  {
    if ((arr[0][i] == arr[1][i]) && (arr[2][i] == arr[1][i]))
    {
      return arr[0][i];
    }
  }
  if ((arr[0][0] == arr[1][1]) && (arr[1][1] == arr[2][2]))
  {
    return arr[0][0];
  }
  if ((arr[0][2] == arr[1][1]) && (arr[1][1] == arr[2][0]))
  {
    return arr[2][0];
  }
  ret = check_full(arr);
  if (ret == 1)
  {
    return 'q';
  }
  return ' ';
}
int main()
{
  char arr[ROW][COL] = { 0 };
  int input = 1;
  while (input)
  {

    printf("請(qǐng)選擇是否開(kāi)始游戲：");
    printf("1:繼續(xù)游戲，0：結(jié)束游戲");
    scanf("%d", &input);
    switch (input)
    {
    case 1:{
      char ret = 0;
      init_board(arr);
      do
      {

        display_board(arr);
        player_chess(arr);
        display_board(arr);
        if (check_win(arr) != ' ')
        {
          ret = check_win(arr);
          break;
        }
        computer_chess(arr);
        ret = check_win(arr);
      } while (ret == ' ');
      display_board(arr);
      if (ret == '#')
      {
        printf("玩家贏的游戲\n");
      }
      else if (ret == '@')
      {
        printf("電腦贏的游戲\n");
      }
      else if (ret == 'q')
      {
        printf("游戲平局\n");
      }
    }

      break;
    case 0:
      break;
    }

  }
  system("pause");
  return 0;
}