57 lines
2.3 KiB
Markdown
57 lines
2.3 KiB
Markdown
# Raindrops
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Convert a number to a string, the contents of which depend on the number's factors.
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- If the number has 3 as a factor, output 'Pling'.
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- If the number has 5 as a factor, output 'Plang'.
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- If the number has 7 as a factor, output 'Plong'.
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- If the number does not have 3, 5, or 7 as a factor,
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just pass the number's digits straight through.
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## Examples
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- 28's factors are 1, 2, 4, **7**, 14, 28.
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- In raindrop-speak, this would be a simple "Plong".
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- 30's factors are 1, 2, **3**, **5**, 6, 10, 15, 30.
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- In raindrop-speak, this would be a "PlingPlang".
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- 34 has four factors: 1, 2, 17, and 34.
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- In raindrop-speak, this would be "34".
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## Rust Installation
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Refer to the [exercism help page][help-page] for Rust installation and learning
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resources.
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## Writing the Code
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Execute the tests with:
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```bash
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$ cargo test
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```
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All but the first test have been ignored. After you get the first test to
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pass, remove the ignore flag (`#[ignore]`) from the next test and get the tests
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to pass again. The test file is located in the `tests` directory. You can
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also remove the ignore flag from all the tests to get them to run all at once
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if you wish.
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Make sure to read the [Crates and Modules](https://doc.rust-lang.org/stable/book/crates-and-modules.html) chapter if you
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haven't already, it will help you with organizing your files.
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## Feedback, Issues, Pull Requests
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The [exercism/xrust](https://github.com/exercism/xrust) repository on GitHub is the home for all of the Rust exercises. If you have feedback about an exercise, or want to help implement new exercises, head over there and create an issue. Members of the [rust track team](https://github.com/orgs/exercism/teams/rust) are happy to help!
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If you want to know more about Exercism, take a look at the [contribution guide](https://github.com/exercism/x-common/blob/master/CONTRIBUTING.md).
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[help-page]: http://exercism.io/languages/rust
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[crates-and-modules]: http://doc.rust-lang.org/stable/book/crates-and-modules.html
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## Source
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A variation on a famous interview question intended to weed out potential candidates. [http://jumpstartlab.com](http://jumpstartlab.com)
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## Submitting Incomplete Problems
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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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