Lua本身是不能像C++那样直接实现继承，我们可以用万能的table表来实现。废话不多说，直接上代码：

父类 People.lua

People = {}
People.name = "人"
People.age = 18	--默认18岁
function People:Speak(str)print(self.name .. "("..self.age.."岁):" .. str)
end
function People:new(obj)	--只针对People写的new方法obj = obj or {}return setmetatable(obj, {__index = self})
end
function new(obj)			--公共继承方法（与上面的方法都可以单独实现）local temp = {}return setmetatable(temp, {__index = obj})
end

子类 Student.lua

require("People")
student01 = People:new()
student01.name = "小王"
student01.age = 19
student01:Speak("我爱吃鸡蛋")student02 = People:new()
student02.name = "小张"
student02:Speak("我爱吃辣条")student03 = People:new()
student03:Speak("我是谁？")student04 = new(People)
student04:Speak("我是谁？")

结果如下：