# http://c2.com/doc/SignatureSurvey/

require 'find'

def file_text file_name
  IO.read(file_name).scan(/[{};]/).join
rescue
  "error in file"  
end

puts Find.find(File.expand_path(ARGV[0] || "."))
         .grep(/\.[ch]$/)
         .map {|fn| "#{fn}:\n#{file_text(fn)}\n" }
         .join($/)