Data update

Task/Arithmetic-evaluation/Elixir/arithmetic-evaluation.elixir

@@ -0,0 +1,13 @@
+defmodule Ast do
+  def main do
+    expr = IO.gets("Give an expression:\n") |> String.Chars.to_string |> String.trim
+    case Code.string_to_quoted(expr) do
+      {:ok, ast} ->
+        IO.puts("AST is: " <> inspect(ast))
+        {result, _} = Code.eval_quoted(ast)
+        IO.puts("Result = #{result}")
+      {:error, {_meta, message_info, _token}} ->
+        IO.puts(message_info)
+    end
+  end
+end