go 中的 Clouser 错误“返回的 arguments 太多”

Question

I am new to go and I am learning go from book "GO_DESIGN_PATTERN" I am new to go but I have decent experience in programming so that book consist of following code (I was on clousers topic)

package main
func main(){
 addN := func(m int) {
     return func(n int){
        return m+n
     }
 }
 addFive := addN(5)
 result := addN(6)
 //5 + 6 must print 7
 println(result)
}

It is throwing following error

./prog.go:4:2: too many arguments to return
    have (func(int))
    want ()
./prog.go:5:2: too many arguments to return
    have (int)
    want ()
./prog.go:8:17: addN(5) used as value
./prog.go:9:16: addN(6) used as value

Answer 1

You must specify the type of return value. func (a int) int {... return value} or func (a int) (b int) {... return}