我无法理解“ ch = ch1”的含义,为什么它可以打印素数?有人可以为我解释吗?我正在学习围棋。
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.package main
package main
import "fmt"
// Send the sequence 2, 3, 4, ... to channel 'ch'.
func generate(ch chan int) {
for i := 2; ; i++ {
ch <- i // Send 'i' to channel 'ch'.
}
}
// Copy the values from channel 'in' to channel 'out',
// removing those divisible by 'prime'.
func filter(in, out chan int, prime int) {
for {
i := <-in // Receive value of new variable 'i' from 'in'.
if i%prime != 0 {
out <- i // Send 'i' to channel 'out'.
}
}
}
// The prime sieve: Daisy-chain filter processes together.
func main() {
ch := make(chan int) // Create a new channel.
go generate(ch) // Start generate() as a goroutine.
for {
prime := <-ch
fmt.Print(prime, " ")
ch1 := make(chan int)
go filter(ch, ch1, prime)
ch = ch1
}
}
有人可以为我解释这些代码吗?我已经学会了使用Go的服务器。
答案 0 :(得分:0)
ch
是“当前频道”。循环如下:
ch1
,它是所有不带数字可被2整除的整数的通道。=
是分配运算符。通过使用ch = ch1
,您可以知道当前通道是所有不可被2整除的整数的通道。ch1
创建为当前频道,而数字没有被3整除。ch1
分配为当前频道。所以现在的频道是所有数字的频道,不能被2整除,不能被3整除。