{
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  {
   "cell_type": "markdown",
   "id": "eeb8ba7c",
   "metadata": {},
   "source": [
    "# 19-03 · Голова и яблоко\n",
    "\n",
    "Практика к разделу [«Рисуем голову и яблоко»](../../site/chapters/glava-19/19-03-golova-yabloko.html)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "91727318",
   "metadata": {},
   "source": [
    "## Цель\n",
    "\n",
    "Создать голову и яблоко, разместить яблоко случайно."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "d3dff998",
   "metadata": {},
   "source": [
    "## Настройка (выполнить один раз)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "7649337d",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-14T20:59:16.642757Z",
     "iopub.status.busy": "2026-08-14T20:59:16.642641Z",
     "iopub.status.idle": "2026-08-14T20:59:16.800796Z",
     "shell.execute_reply": "2026-08-14T20:59:16.800342Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Экран готов.\n"
     ]
    }
   ],
   "source": [
    "import random\n",
    "import turtle\n",
    "\n",
    "RAZMER_SHAGA = 20\n",
    "GRANICA = 280\n",
    "\n",
    "screen = turtle.Screen()\n",
    "screen.title(\"Змейка\")\n",
    "screen.bgcolor(\"black\")\n",
    "screen.setup(width=600, height=600)\n",
    "screen.tracer(0)\n",
    "print(\"Экран готов.\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "9e88829a",
   "metadata": {},
   "source": [
    "## Рабочий пример"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "4516cbf5",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-14T20:59:16.801987Z",
     "iopub.status.busy": "2026-08-14T20:59:16.801811Z",
     "iopub.status.idle": "2026-08-14T20:59:16.806200Z",
     "shell.execute_reply": "2026-08-14T20:59:16.805702Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Голова: (0.00,0.00)\n",
      "Яблоко: (200.00,-280.00)\n"
     ]
    }
   ],
   "source": [
    "golova = turtle.Turtle()\n",
    "golova.speed(0)\n",
    "golova.shape(\"square\")\n",
    "golova.color(\"white\")\n",
    "golova.penup()\n",
    "golova.goto(0, 0)\n",
    "\n",
    "yabloko = turtle.Turtle()\n",
    "yabloko.speed(0)\n",
    "yabloko.shape(\"circle\")\n",
    "yabloko.color(\"red\")\n",
    "yabloko.penup()\n",
    "\n",
    "def novoe_yabloko():\n",
    "    x = random.randrange(-GRANICA, GRANICA, RAZMER_SHAGA)\n",
    "    y = random.randrange(-GRANICA, GRANICA, RAZMER_SHAGA)\n",
    "    yabloko.goto(x, y)\n",
    "\n",
    "novoe_yabloko()\n",
    "print(\"Голова:\", golova.position())\n",
    "print(\"Яблоко:\", yabloko.position())\n",
    "screen.update()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "55072650",
   "metadata": {},
   "source": [
    "## Эксперимент 1\n",
    "\n",
    "Проверьте, что яблоко всегда появляется «в клетке» (координаты кратны RAZMER_SHAGA)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "b8ca0fd9",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-14T20:59:16.807594Z",
     "iopub.status.busy": "2026-08-14T20:59:16.807427Z",
     "iopub.status.idle": "2026-08-14T20:59:16.810693Z",
     "shell.execute_reply": "2026-08-14T20:59:16.810238Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "100 -180 -> кратно шагу: True\n",
      "140 -200 -> кратно шагу: True\n",
      "-80 -160 -> кратно шагу: True\n",
      "40 -260 -> кратно шагу: True\n",
      "-140 -200 -> кратно шагу: True\n"
     ]
    }
   ],
   "source": [
    "for _ in range(5):\n",
    "    novoe_yabloko()\n",
    "    x, y = yabloko.position()\n",
    "    print(x, y, \"-> кратно шагу:\", x % RAZMER_SHAGA == 0 and y % RAZMER_SHAGA == 0)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "f3f69996",
   "metadata": {},
   "source": [
    "## Завершение (выполнить один раз, в самом конце)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "d6bbab7f",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-14T20:59:16.811755Z",
     "iopub.status.busy": "2026-08-14T20:59:16.811645Z",
     "iopub.status.idle": "2026-08-14T20:59:16.814769Z",
     "shell.execute_reply": "2026-08-14T20:59:16.814330Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Окно закрыто.\n"
     ]
    }
   ],
   "source": [
    "screen.bye()\n",
    "print(\"Окно закрыто.\")"
   ]
  }
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