greedy algorithm in ruby

gistfile1.txt

def make_change(number, *coin_values)
  coin_values.empty? ? cents = [50, 20, 10, 5, 2, 1] : cents = coin_values.flatten
  rest = []
  if number > 0
    cents.each do |c|
      while c <= number
        number -= c
        rest << c
      end
    end
  else
    puts "Negative value!"
  end
  print rest.flatten
end

make_change(14, [10, 7, 1])