--男人类man = {name = "man",age=123}--继承空间man.__index=man--儿童类child= {}--继承setmetatable(child,man)print(child.age)yong= {}setmetatable(yong,man)child.age=12yong.age=16print("青年年龄:"..yong.age..",儿童团年龄:"..child.age)print(man.age)