can I add file IO? / 可以添加文件输入输出吗？

[Clayblockunova]

afaik, the code here can only output something equivalent to a Hello World. can I add file IO?
此处代码目前只能输出Hello World程序类似物。 可以添加文件输入输出吗？

[kuangkzh]

Sure, It's ok