## Fiddle ```ruby require 'fiddle/import' S = Fiddle::Importer.struct(["int i"]) a = S.malloc a.i = 10 b = a.clone b.i = 20 p a.i # 20 p b.i # 20 ``` ## Ruby-FFI ```ruby require 'ffi' class S < FFI::Struct layout :i, :int end a = S.new a[:i] = 10 b = a.clone b[:i] = 20 p a[:i] # 10 p b[:i] # 20 ```