eror for compiling for board arduino/genuino uno

help me

Ok.
You go first.

You can start by reading How to use this forum - please read, specifically point 7.

And in case you don't get AWOL's hint, we can't see your code and we can't see your error messages. For the latter, when an error occurs there will be a button "copy error messages" at the right top of the output window; click that and paste clipboard in a post.