GO：导入我的Go文件时出错

This is the project structure

   /bruteforce
   --/src
   ----/services
   ------/bruteforce.go
   ----/start
   ------/workergenerator.go

In bruteforce.go i used "package services", and in workergenerator.go "package main". Now, i wrote a simple function in bruteforce.go, so in workergenerator.go i imported services package and called this function. This is the problem:

src/start/workergenerator.go:17:2: imported and not used: "services" src/start/workergenerator.go:26:5: undefined: bruteforce

As you can see, the package is imported well, but the function is not defined (?)

I added to the GOPATH the main folder of my project

/Users/simon/GolandProjects/bruteforce

Why does the compiler cause this error?

You need to go to Run | Edit Configurations..., select the run configuration you have and then change the Run Kind from File to Package and use start for the Package Name