March 2014 update

Task/Roman-numerals-Encode/Rust/roman-numerals-encode.rust

@@ -0,0 +1,37 @@
+struct RomanNumeral {
+  symbol: &'static str,
+  value: uint
+}
+
+static NUMERALS: [RomanNumeral, ..13] = [
+  RomanNumeral {symbol: "M",  value: 1000},
+  RomanNumeral {symbol: "CM", value: 900},
+  RomanNumeral {symbol: "D",  value: 500},
+  RomanNumeral {symbol: "CD", value: 400},
+  RomanNumeral {symbol: "C",  value: 100},
+  RomanNumeral {symbol: "XC", value: 90},
+  RomanNumeral {symbol: "L",  value: 50},
+  RomanNumeral {symbol: "XL", value: 40},
+  RomanNumeral {symbol: "X",  value: 10},
+  RomanNumeral {symbol: "IX", value: 9},
+  RomanNumeral {symbol: "V",  value: 5},
+  RomanNumeral {symbol: "IV", value: 4},
+  RomanNumeral {symbol: "I",  value: 1}
+];
+
+fn to_roman(num: uint) -> ~str {
+  for numeral in NUMERALS.iter() {
+    if num >= numeral.value {
+      return numeral.symbol + to_roman(num - numeral.value);
+    }
+  }
+
+  return ~"";
+}
+
+fn main() {
+  let nums = [2014, 1999, 25, 1666, 3888];
+  for n in nums.iter() {
+    println!("{:u} = {:s}", *n, to_roman(*n));
+  }
+}