Language: C C++ D Haskell Lua OCaml PHP Perl Plain Text Python Ruby Scheme Tcl def let(*a) yield(*a) end let(Proc.new { |cc| puts ""; print "@"; cc }[callcc { |cc| cc }], Proc.new { |cc| print "*"; cc }[callcc { |cc| cc }]) do |yin, yang| yin[yang] end Private [?] Run code