https://github.com/tsundberg/roman-numbers
Transform between Arabic and Roman numbers
https://github.com/tsundberg/roman-numbers
Last synced: 4 months ago
JSON representation
Transform between Arabic and Roman numbers
- Host: GitHub
- URL: https://github.com/tsundberg/roman-numbers
- Owner: tsundberg
- Created: 2021-06-04T04:45:09.000Z (about 4 years ago)
- Default Branch: main
- Last Pushed: 2021-06-04T13:18:52.000Z (about 4 years ago)
- Last Synced: 2025-01-05T13:42:23.178Z (5 months ago)
- Language: Java
- Size: 101 KB
- Stars: 0
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Reverse Roman
Given a Roman number as a string (eg "XX") determine its integer value (eg 20).
You cannot write numerals like IM for 999. Wikipedia states "Modern Roman numerals are written by expressing each digit separately starting with the leftmost digit and skipping any digit with a value of zero."
Examples:
```
"I" -> 1
"II" -> 2
"III" -> 3
"IV" -> 4
"V" -> 5
"VI" -> 6
"VII" -> 7
"VIII" -> 8
"IX" -> 9
"X" -> 10
"XX" -> 20
"XXX" -> 30
"XL" -> 40
"L" -> 50
"LX" -> 60
"LXX" -> 70
"LXXX" -> 80
"XC" -> 90
"C" -> 100
"CC" -> 200
"CCC" -> 300
"CD" -> 400
"D" -> 500
"DC" -> 600
"DCC" -> 700
"DCCC" -> 800
"CM" -> 900
"M" -> 1000
"MM" -> 2000
"MMM" -> 3000
"MMMM" -> 4000
"MCMXC" -> 1990 ("M" -> 1000 + "CM" -> 900 + "XC" -> 90)
"MMVIII" -> 2008 ("MM" -> 2000 + "VIII" -> 8)
"XCIX" -> 99 ("XC" -> 90 + "IX" -> 9)
"XLVII" -> 47 ("XL" -> 40 + "VII" -> 7)
```
## Building
Running the tests can be done using gradle like this:
```
./gradlew clean test
```