我是 golang 新手，正在研究 goroutine。我故意編寫了使用 goroutine 來除法的簡單代碼。首先，我給出基數并繼續除它的數，直到它不可整除但是，我改為go split(n)，split(n)它不能像下面那樣工作，這是為什么？■ 源代碼package mainimport (    "flag"    "fmt"    "log"    "net/http"    "os"    "strconv")var next = make(chan int)var quit = make(chan int)func divide(n int) {    defer func(){ quit <- 1 }()    fmt.Println("[divide] n = " + strconv.Itoa(n))    r := n % 2    if r == 0 {        next <- n / 2    }}func execute() {    fmt.Println("[execute] start")    count := 0    end   := false    for !end {        select {        case n := <- next:            count++            fmt.Println("[execute] n = " + strconv.Itoa(n) + ", count = " + strconv.Itoa(count))            go divide(n)        case _ = <- quit:            count--            fmt.Println("[execute] end. count = " + strconv.Itoa(count))            if count <= 0 {                end = true            }        }    }    fmt.Println("complete")    os.Exit(0)}func main() {    base := flag.Int("n", 1, "Input the number")    flag.Parse()    if *base <= 0 {        fmt.Println("please more than 1")        os.Exit(0)    }    go execute()    next <- *base    if err := http.ListenAndServe(":8080", nil); err != nil {        log.Fatal("ListenAndSearver:", err)    }}■ 結果（工作正常）$ go run main.go -n 6[execute] start[execute] n = 6, count = 1[divide] n = 6[execute] n = 3, count = 2[execute] end. count = 1[divide] n = 3[execute] end. count = 0complete■ 結果（不工作）$ go run main.go -n 6[execute] start[execute] n = 6, count = 1[divide] n = 6