package main
// 生成2, 3, 4, ... 到 channel 'ch'中.
func Generate(ch chan- int) {
    for i := 2; ; i++ {
        ch - i  // Send 'i' to channel 'ch'.
    }
}
// 從管道復(fù)制值 'in' 到 channel 'out',
// 移除可整除的數(shù) 'prime'.
func Filter(in -chan int, out chan- int, prime int) {
    for {
        i := -in    // 接收值 'in'.
        if i%prime != 0 {
            out - i // 傳入 'i' 到 'out'.
        }
    }
}
func main() {
    ch := make(chan int)    // Create a newchannel.
    go Generate(ch) // Launch Generate goroutine.
    for i := 0; i 10; i++ {
        prime := -ch
        print(prime, "\n")
        ch1 := make(chan int)
        go Filter(ch, ch1, prime)
        ch = ch1
    }
}