From 6e5c7cbb5923f7627abc3b720600b6f1df718132 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Sun, 28 Aug 2016 02:36:40 +0200 Subject: Solve roman --- go/roman-numerals/roman_numerals.go | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 go/roman-numerals/roman_numerals.go (limited to 'go/roman-numerals/roman_numerals.go') diff --git a/go/roman-numerals/roman_numerals.go b/go/roman-numerals/roman_numerals.go new file mode 100644 index 0000000..21727e2 --- /dev/null +++ b/go/roman-numerals/roman_numerals.go @@ -0,0 +1,19 @@ +package romannumerals + +import "errors" + +const testVersion = 2 + +var ( + m0 = []string{"", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"} + m1 = []string{"", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC"} + m2 = []string{"", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM"} + m3 = []string{"", "M", "MM", "MMM"} +) + +func ToRomanNumeral(n int) (string, error) { + if n < 1 || n >= 4000 { + return "", errors.New("out of range") + } + return m3[n%1e4/1e3] + m2[n%1e3/1e2] + m1[n%1e2/1e1] + m0[n%1e1], nil +} -- cgit v1.2.3