Initial data commit

Task/Gray-code/V-(Vlang)/gray-code.v

@@ -0,0 +1,21 @@
+fn enc(b int) int {
+    return b ^ b>>1
+}
+
+fn dec(gg int) int {
+    mut b := 0
+    mut g := gg
+    for ; g != 0; g >>= 1 {
+        b ^= g
+    }
+    return b
+}
+
+fn main() {
+    println("decimal  binary   gray    decoded")
+    for b := 0; b < 32; b++ {
+        g := enc(b)
+        d := dec(g)
+        println("  ${b:2}     ${b:05b}   ${g:05b}   ${d:05b}  ${d:2}")
+    }
+}