// 程序初始化
void init()
{
 score = 0;
 memset(a, 0, sizeof(a));
 int x1 = rand() % 4 + 1, y1 = rand() % 4 + 1, x2 = rand() % 4 + 1, y2 = rand() % 4 + 1; // 隨機(jī)生成兩個(gè)初始點(diǎn)
 a[x1][y1] = a[x2][y2] = 2;    // 初始點(diǎn)初始化為 2
}

void drawmap()
{
 system("cls");
 
 for (int i = 1; i <= 4; i++)
 {
  for (int j = 1; j <= 4; j++)
  {
   if (a[i][j])   // 如果該位置沒(méi)有數(shù)字，則不繪制
   {
    if(a[i][j]>1000)
     cout<<a[i][j]<<" ";
    else if(a[i][j]>100)
     cout<<a[i][j]<<"  ";
    else if(a[i][j]>10)
     cout<<" "<<a[i][j]<<"  ";
    else
     cout<<"  "<<a[i][j]<<"  ";
   }
   else
   {
    cout<<"     ";
   }
  }
  cout<<"\n";
   
 }
   
 
}

// 玩家操作
void move()
{
 memcpy(b, a, sizeof(a));   // 將 a 備份至 b
 memset(mov, false, sizeof(mov)); // 初始化 mov 為 false（所有點(diǎn)均未移動(dòng)）
 char c;
 cin>>c;

 if(c=='w') //向上
 {
  for (j = 1; j <= 4; j++)
   for (i = 2; i <= 4; i++)
   {
    if (!a[i][j])continue;
    int k = i;
    while (!a[k - 1][j] && k >= 2)
    {
     a[k - 1][j] = a[k][j];
     a[k][j] = 0;
     k--;
    }
    if (a[k][j] == a[k - 1][j] && !mov[k - 1][j])
    {
     a[k - 1][j] = 2 * a[k][j];
     a[k][j] = 0;
     mov[k - 1][j] = true;
     score += a[k - 1][j];
    }
   }
 }
 else if(c=='s') //向下 
 {
  //。。。
 } 
 else if(c=='a') //向左
 {
  //。。。
 } 
 else if(c=='d')
 {
 }
}

bool gameover()
{

 for (i = 1; i <= 4; i++)
  for ( j = 1; j <= 4; j++)
   if (!a[i][j] || a[i][j] == a[i + 1][j] || a[i][j] == a[i - 1][j] || a[i][j] == a[i][j + 1] || a[i][j] == a[i][j - 1])return false;
 
 return true;
}


bool win()
{
 for ( i = 1; i <= 4; i++)
  for ( j = 1; j <= 4; j++)
   if (a[i][j] == 256)return true;
 return false;
}