# illustrates returning multiple values from a function

def get_three_ints
  puts "Enter three numbers on three lines:"
  a = gets.to_i
  b = gets.to_i
  c = gets.to_i
  return [a, b, c]
end

def main
  x, y, z = get_three_ints
  ave = ((x + y + z) / 3.0).round(2)
  puts "The average, rounded to two decimals, is " + ave.to_s
end

# call main if running from the command prompt:
if __FILE__ == $0

  main

end