ruby 变量和方法

def say_goodnight(name)
  result ="Good night ." +name
  return result
end

def say_goodmorning(name)
  result ="Good morning .#{name}" 
  return result
end

def say_goodafternoon(name)
  result ="Good afternoon .#{name}" 
end


puts say_goodnight("jake")

puts say_goodmorning("heidsoft")

puts say_goodafternoon("heidcloud")