## io.rename
### 接口说明
>重命名一个文件
>
+++
put:io.rename
var:oldfilename=原文件名字#
var:newfilename=新文件名字#
<<<
success
无返回
+++
### 代码演示
~~~
io.rename("d:/a.txt","d:/b.txt");
~~~
- 引言
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