C_in_Ruby.rb

require "rubygems"
require 'inline'

class Test1
  inline(:C) do |builder|
    builder.include '<iostream>'
    builder.add_compile_flags '-x c++', '-lstdc++'
    builder.c '
      using namespace std;
      void zbroji(int a, int b){
        cout << (a+b) << endl;
      }'
  end
end
t = Test1.new()
t.zbroji(2, 3)