Data update

Task/Gray-code/Pluto/gray-code.pluto

@@ -0,0 +1,19 @@
+local fmt = require "fmt"
+
+local function to_gray(n) return n ~ (n >> 1) end
+
+local function from_gray(g)
+    local b = 0
+    while g != 0 do
+        b ~= g
+        g >>= 1
+    end
+    return b
+end
+
+print("decimal  binary  gray    decoded")
+for b = 0, 31 do
+    fmt.write("  %2d     %05d", b, fmt.bin(b))
+    local g = to_gray(b)
+    fmt.print("   %05d   %05d", fmt.bin(g), fmt.bin(from_gray(g)))
+end