40 lines
1.0 KiB
Markdown
40 lines
1.0 KiB
Markdown
|
# 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
|
||
|
|
|
||
|
|
Check out [Exercism
|
||
|
|
Help](http://help.exercism.io/getting-started-with-haskell.html) for
|
||
|
|
instructions to get started writing Haskell.
|
||
|
|
|
||
|
|
## Running Tests
|
||
|
|
|
||
|
|
Use `runhaskell` (included in the Haskell Platform) to compile and run your
|
||
|
|
Haskell code.
|
||
|
|
|
||
|
|
$ runhaskell -Wall bob_test.hs
|
||
|
|
|
||
|
|
## Source
|
||
|
|
|
||
|
|
JavaRanch Cattle Drive, exercise 3 [view source](http://www.javaranch.com/leap.jsp)
|