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- douying8666 2018-07-27 16:09关注
Instead of importing ../foo/math you want to import ../foo because you're importing the folder aka the package. There is no folder named math.
If you import ../foo you can use the exported features of all the files within that folder.
As for part two of your question, there needs to be a package main if you are producing an executable, usually I keep my main go file in the root directory instead in a folder. If you are simply making a library than instead of main the package name is the name of the folder (package) as per usual.
If you have a lot of folders no one will be able to find the main function if it's in a folder called bar.
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