69 lines
2.2 KiB
Markdown
69 lines
2.2 KiB
Markdown
# Allergies
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Given a person's allergy score, determine whether or not they're allergic to a given item, and their full list of allergies.
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An allergy test produces a single numeric score which contains the
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information about all the allergies the person has (that they were
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tested for).
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The list of items (and their value) that were tested are:
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* eggs (1)
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* peanuts (2)
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* shellfish (4)
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* strawberries (8)
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* tomatoes (16)
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* chocolate (32)
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* pollen (64)
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* cats (128)
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So if Tom is allergic to peanuts and chocolate, he gets a score of 34.
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Now, given just that score of 34, your program should be able to say:
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- Whether Tom is allergic to any one of those allergens listed above.
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- All the allergens Tom is allergic to.
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Note: a given score may include allergens **not** listed above (i.e.
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allergens that score 256, 512, 1024, etc.). Your program should
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ignore those components of the score. For example, if the allergy
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score is 257, your program should only report the eggs (1) allergy.
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## Getting Started
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Make sure you have read the "Guides" section of the
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[C track][c-track] on the Exercism site. This covers
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the basic information on setting up the development environment expected
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by the exercises.
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## Passing the Tests
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Get the first test compiling, linking and passing by following the [three
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rules of test-driven development][3-tdd-rules].
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The included makefile can be used to create and run the tests using the `test`
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task.
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make test
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Create just the functions you need to satisfy any compiler errors and get the
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test to fail. Then write just enough code to get the test to pass. Once you've
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done that, move onto the next test.
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As you progress through the tests, take the time to refactor your
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implementation for readability and expressiveness and then go on to the next
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test.
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Try to use standard C99 facilities in preference to writing your own
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low-level algorithms or facilities by hand.
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## Source
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Jumpstart Lab Warm-up [http://jumpstartlab.com](http://jumpstartlab.com)
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## Submitting Incomplete Solutions
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It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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[c-track]: https://exercism.io/my/tracks/c
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[3-tdd-rules]: http://butunclebob.com/ArticleS.UncleBob.TheThreeRulesOfTdd
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