March 2014 update

Task/Gray-code/Rust/gray-code.rust

@@ -0,0 +1,19 @@
+fn gray_encode(integer: uint) -> uint {
+	(integer >> 1) ^ integer
+}
+
+fn gray_decode(integer: uint) -> uint {
+	match integer {
+		0 => 0,
+		_ => integer ^ gray_decode(integer >> 1)
+	}
+}
+
+
+fn main() {
+	for i in range(0u,32u) {
+		println!("{:2} {:0>5t} {:0>5t} {:2}", i, i, gray_encode(i),
+			gray_decode(i));
+	}
+
+}