local function search(k, plist)	for i, v in pairs(plist) do		local temp_v = v[k]		if temp_v then			return temp_v		end	endendfunction createClass(...)	local c = {}	local parents = {...}		--父類列表中搜索方法	setmetatable(c, { __index = function(t, k) return search(k, parents) end } )	c.__index = c		--定義一個新的構造函數	function c:new(o)		o = o or {}		setmetatable(o, c)		return o	end	return cendNamed = {}function Named:getname()	return self.nameendfunction Named:setname(n)	self.name = nendlocal NamedAccount = createClass(Account, Named)account = NamedAccount:new({name = "Paul"})print(account:getname())