Converting_Headings.ipynb

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        "id": "M-4JNDtttDXa"
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      "source": [
        "# For marine navigation\n",
        "# Practice converting magnetic headings to true, and vice versa\n",
        "# Factors for magnetic variation only, not magnetic deviation\n",
        "\n",
        "import random\n",
        "from random import randrange\n",
        "\n",
        "c_direction = [\"W\", \"E\"]\n",
        "h_type = [\"M\", \"T\"]\n",
        "\n",
        "class Variation:\n",
        "  def __init__(self, heading, c_direction):\n",
        "    self.heading = heading\n",
        "    self.c_direction = c_direction\n",
        "\n",
        "class Heading:\n",
        "  def __init__(self, heading, h_type):\n",
        "    self.heading = heading\n",
        "    self.h_type = h_type\n",
        "\n",
        "class Response:\n",
        "  def __init__(self, heading, h_type):\n",
        "    self.heading = heading\n",
        "    self.h_type = h_type\n",
        "\n",
        "class Answer:\n",
        "  def __init__(self, heading, h_type):\n",
        "    self.heading = heading\n",
        "    self.h_type = h_type\n",
        "\n",
        "rounds_to_go = 0\n",
        "rounds_done = 0\n",
        "\n",
        "print(\"Hello! Welcome to this little app, where you can practice converting magnetic and true headings given datapoints regarding variation.\")\n",
        "rounds_to_go = input(\"How many times do you wish to practice? \")\n",
        "while not rounds_to_go.isdigit():\n",
        "  rounds_to_go = input(\"Enter a number only: \")\n",
        "\n",
        "rounds_to_go = int(rounds_to_go)\n",
        "\n",
        "while rounds_to_go > rounds_done:\n",
        "\n",
        "  variation = Variation(randrange(0, 30), random.choice(c_direction))\n",
        "  heading = Heading(randrange(0, 359), random.choice(h_type))\n",
        "  user_response = Response(0, h_type[0])\n",
        "  correct_answer = Answer(0, h_type[0])\n",
        "  result = 0\n",
        "\n",
        "  print(\"\\nConvert the following heading to magnetic or true, as applicable: \" + str(heading.heading), str(heading.h_type))\n",
        "  print(\"The variation for this problem is: \" + str(variation.heading), str(variation.c_direction))\n",
        "\n",
        "  user_response.heading = int(input(\"Please enter new compass heading (number only): \"))\n",
        "  user_response.h_type = str(input(\"Please indicate whether the heading is magnetic [M] or true [T]: \"))\n",
        "\n",
        "  print(\"You have entered: \" + str(user_response.heading), str(user_response.h_type))\n",
        "\n",
        "# if heading is true and variation is west\n",
        "# answer heading is magnetic\n",
        "# answer heading is equal to heading plus variation\n",
        "# if this amount exceeds 359\n",
        "# then subtract 359\n",
        "# otherwise stet\n",
        "\n",
        "  if heading.h_type == h_type[1] and variation.c_direction == c_direction[0]:\n",
        "    correct_answer.h_type = h_type[0]\n",
        "    result = heading.heading + variation.heading\n",
        "    if result > 359:\n",
        "      correct_answer.heading = result - 359\n",
        "    else:\n",
        "      correct_answer.heading = result\n",
        "\n",
        "# if heading is true and variation is east\n",
        "# answer heading is magnetic\n",
        "# answer heading is equal to heading minus variation\n",
        "# if this amount is less than 0\n",
        "# then add 359\n",
        "# otherwise stet\n",
        "\n",
        "  if heading.h_type == h_type[1] and variation.c_direction == c_direction [1]:\n",
        "    correct_answer.h_type = h_type[0]\n",
        "    result = heading.heading - variation.heading\n",
        "    if result < 0:\n",
        "      correct_answer.heading = result + 359\n",
        "    else:\n",
        "      correct_answer.heading = result\n",
        "\n",
        "# if heading is magnetic and variation is west\n",
        "# answer heading is true\n",
        "# answer heading is equal to heading minus variation\n",
        "# if this amount is less than 0\n",
        "# then add 359\n",
        "# otherwise stet\n",
        "\n",
        "  if heading.h_type == h_type[0] and variation.c_direction == c_direction[0]:\n",
        "    correct_answer.h_type = h_type[1]\n",
        "    result = heading.heading - variation.heading\n",
        "    if result < 0:\n",
        "      correct_answer.heading = result + 359\n",
        "    else:\n",
        "      correct_answer.heading = result\n",
        "\n",
        "# if heading is magnetic and variation is east\n",
        "# answer heading is true\n",
        "# answer heading is equal to heading plus variation\n",
        "# if this amount exceeds 359\n",
        "# then substract 359\n",
        "# otherwise stet\n",
        "\n",
        "  if heading.h_type == h_type[0] and variation.c_direction == c_direction[1]:\n",
        "    correct_answer.h_type = h_type[1]\n",
        "    result = heading.heading + variation.heading\n",
        "    if result > 359:\n",
        "      correct_answer.heading = result - 359\n",
        "    else:\n",
        "      correct_answer.heading = result\n",
        "\n",
        "# Print correct answer\n",
        "  print(\"The correct answer is: \" + str(correct_answer.heading), str(correct_answer.h_type))\n",
        "\n",
        "# Check whether user's response is correct\n",
        "  if user_response.h_type == correct_answer.h_type and user_response.heading == correct_answer.heading:\n",
        "    print(\"You have entered the correct answer.\")\n",
        "  else:\n",
        "    print(\"You have entered the incorrect answer.\")\n",
        "\n",
        "  rounds_done += 1\n",
        "\n",
        "print(\"\\nThanks for practicing with me!\")"
      ]
    }
  ]
}