package main

import io "fmt" //引用fmt这个包时，名字重命名为io
import _ "os"    //引用os这个包，但是不调用，其实就是引用它的init函数

func main()  {
    io.Println("aaaaaaaaaaa")
}

GOROOT=C:\Go #gosetup
GOPATH=E:\go\develop #gosetup
C:\Go\bin\go.exe build -i -o C:\Users\baylor\AppData\Local\Temp\___go_build__go.exe E:/awesomeProject01/导入包.go #gosetup
"C:\Program Files\JetBrains\GoLand 2018.1.5\bin\runnerw.exe" C:\Users\baylor\AppData\Local\Temp\___go_build__go.exe #gosetup
aaaaaaaaaaa