README
¶
Say
Given a number from 0 to 999,999,999,999, spell out that number in English.
Step 1
Handle the basic case of 0 through 99.
If the input to the program is 22, then the output should be
'twenty-two'.
Your program should complain loudly if given a number outside the blessed range.
Some good test cases for this program are:
- 0
- 14
- 50
- 98
- -1
- 100
Extension
If you're on a Mac, shell out to Mac OS X's say program to talk out
loud.
Step 2
Implement breaking a number up into chunks of thousands.
So 1234567890 should yield a list like 1, 234, 567, and 890, while the
far simpler 1000 should yield just 1 and 0.
The program must also report any values that are out of range.
Step 3
Now handle inserting the appropriate scale word between those chunks.
So 1234567890 should yield '1 billion 234 million 567 thousand 890'
The program must also report any values that are out of range. It's fine to stop at "trillion".
Step 4
Put it all together to get nothing but plain English.
12345 should give twelve thousand three hundred forty-five.
The program must also report any values that are out of range.
Extensions
Use and (correctly) when spelling out the number in English:
- 14 becomes "fourteen".
- 100 becomes "one hundred".
- 120 becomes "one hundred and twenty".
- 1002 becomes "one thousand and two".
- 1323 becomes "one thousand three hundred and twenty-three".
Running the tests
To run the tests run the command go test from within the exercise directory.
If the test suite contains benchmarks, you can run these with the -bench
flag:
go test -bench .
Keep in mind that each reviewer will run benchmarks on a different machine, with different specs, so the results from these benchmark tests may vary.
Further information
For more detailed information about the Go track, including how to get help if you're having trouble, please visit the exercism.io Go language page.
Source
A variation on JavaRanch CattleDrive, exercise 4a http://www.javaranch.com/say.jsp
Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.
Documentation
Source Files