golang在另一个文件中声明的“未定义”功能？

Question

I'm trying to write a basic go program that calls a function on a different file, but a part of the same package. However, it returns:

undefined: NewEmployee

Here is the source code:

main.go:

package main

func main() {
emp := NewEmployee()    
}

employee.go:

package main

type Employee struct {
    name string
    age int
}   

func NewEmployee() *Employee {
    p := &Employee{}
    return p
}

func PrintEmployee (p *Employee)  {
    return "Hello world!"
}

Answer 1

Please read "How to Write Go Code".

Don't use /src in your GOPATH. Packages are located in $GOPATH/src.

For build or install you need to have your files in a package directory.

For go run, you need to supply all files as argument:

go run main.go employee.go

But, you should almost always use go install, or go build (and preferably the former, as go build causes confusion when working with non-main packages)