# Leap

Write a program that will take a year and report if it is a leap year.

The tricky thing here is that a leap year occurs:

```plain
on every year that is evenly divisible by 4
  except every year that is evenly divisible by 100
    unless the year is also evenly divisible by 400
```

For example, 1997 is not a leap year, but 1996 is.  1900 is not a leap
year, but 2000 is.

If your language provides a method in the standard library that does
this look-up, pretend it doesn't exist and implement it yourself.

## Notes

For a delightful, four minute explanation of the whole leap year
phenomenon, go watch [this youtube video][video].

[video]: http://www.youtube.com/watch?v=xX96xng7sAE

## Rust Installation

Refer to the [exercism help page][help-page] for Rust installation and learning
resources.

## Writing the Code

Execute the tests with:

```bash
$ cargo test
```

All but the first test have been ignored.  After you get the first test to
pass, remove the ignore flag (`#[ignore]`) from the next test and get the tests
to pass again.  The test file is located in the `tests` directory.   You can
also remove the ignore flag from all the tests to get them to run all at once
if you wish.

Make sure to read the [Crates and Modules](crates-and-modules) chapter if you
haven't already, it will help you with organizing your files.

[help-page]: http://help.exercism.io/getting-started-with-rust.html
[crates-and-modules]: http://doc.rust-lang.org/stable/book/crates-and-modules.html

## Source

JavaRanch Cattle Drive, exercise 3 [view source](http://www.javaranch.com/leap.jsp)