go语言产生素数

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'.

    }

}

// 从管道复制值 'in' 到 channel 'out',

// 移除可整除的数 'prime'.

func Filter(in <-chan int, out chan<- int, prime int) {

    for {

        i := <-in // 接收值 'in'.

        if i%prime != 0 {

            out <- i // 传入 'i' 到 'out'.

        }

    }

}

func main() {

    ch := make(chan int) // Create a newchannel.

    go Generate(ch)      // Launch Generate goroutine.

    for {

        prime := <-ch

        print(prime, "\n")

        ch1 := make(chan int)

        go Filter(ch, ch1, prime)

        ch = ch1

    }

}