Given an array find the combination of two numbers in the array which makes the given sum

two_sum.rb

require 'set'

def twosum arr,sum_arr

  a = Set.new(arr)
  sum_arr.each do |sum|
    count = 0
    arr.each do |elem|
      puts("#{sum} = #{elem} + #{sum-elem}") if a.include? (sum-elem)      
    end
  end

end