https://github.com/adzz/exercism_bowling
https://github.com/adzz/exercism_bowling
Last synced: 12 months ago
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- Host: GitHub
- URL: https://github.com/adzz/exercism_bowling
- Owner: Adzz
- Created: 2020-06-06T14:55:16.000Z (about 6 years ago)
- Default Branch: master
- Last Pushed: 2020-06-07T20:46:00.000Z (about 6 years ago)
- Last Synced: 2025-03-29T08:44:00.621Z (over 1 year ago)
- Language: Elixir
- Size: 7.81 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Bowling
Score a bowling game.
Bowling is a game where players roll a heavy ball to knock down pins
arranged in a triangle. Write code to keep track of the score
of a game of bowling.
## Scoring Bowling
The game consists of 10 frames. A frame is composed of one or two ball
throws with 10 pins standing at frame initialization. There are three
cases for the tabulation of a frame.
* An open frame is where a score of less than 10 is recorded for the
frame. In this case the score for the frame is the number of pins
knocked down.
* A spare is where all ten pins are knocked down by the second
throw. The total value of a spare is 10 plus the number of pins
knocked down in their next throw.
* A strike is where all ten pins are knocked down by the first
throw. The total value of a strike is 10 plus the number of pins
knocked down in the next two throws. If a strike is immediately
followed by a second strike, then the value of the first strike
cannot be determined until the ball is thrown one more time.
Here is a three frame example:
| Frame 1 | Frame 2 | Frame 3 |
| :-------------: |:-------------:| :---------------------:|
| X (strike) | 5/ (spare) | 9 0 (open frame) |
Frame 1 is (10 + 5 + 5) = 20
Frame 2 is (5 + 5 + 9) = 19
Frame 3 is (9 + 0) = 9
This means the current running total is 48.
The tenth frame in the game is a special case. If someone throws a
strike or a spare then they get a fill ball. Fill balls exist to
calculate the total of the 10th frame. Scoring a strike or spare on
the fill ball does not give the player more fill balls. The total
value of the 10th frame is the total number of pins knocked down.
For a tenth frame of X1/ (strike and a spare), the total value is 20.
For a tenth frame of XXX (three strikes), the total value is 30.
## Requirements
Write code to keep track of the score of a game of bowling. It should
support two operations:
* `roll(pins : int)` is called each time the player rolls a ball. The
argument is the number of pins knocked down.
* `score() : int` is called only at the very end of the game. It
returns the total score for that game.
## Running tests
Execute the tests with:
```bash
$ mix test
```
### Pending tests
In the test suites, all but the first test have been skipped.
Once you get a test passing, you can unskip the next one by
commenting out the relevant `@tag :pending` with a `#` symbol.
For example:
```elixir
# @tag :pending
test "shouting" do
assert Bob.hey("WATCH OUT!") == "Whoa, chill out!"
end
```
Or, you can enable all the tests by commenting out the
`ExUnit.configure` line in the test suite.
```elixir
# ExUnit.configure exclude: :pending, trace: true
```
If you're stuck on something, it may help to look at some of
the [available resources](https://exercism.io/tracks/elixir/resources)
out there where answers might be found.
## Source
The Bowling Game Kata at but UncleBob [http://butunclebob.com/ArticleS.UncleBob.TheBowlingGameKata](http://butunclebob.com/ArticleS.UncleBob.TheBowlingGameKata)
## Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.