// ithelp0707.go
// Craeted: 2020-07-07 22:35:39 
// ---------------------
package main

import (
  "fmt"
  "time"
)

var message chan string

func Bot() {
  for msg := range message {
    fmt.Printf("Bot Print:%s\n", msg)
  }
}

func main() {
  message = make(chan string, 5)

  go Bot()

  message <- "first message"
  fmt.Println("Main: first message send finish")
  message <- "second message"
  fmt.Println("Main: second message send finish")
  
  time.Sleep(1 * time.Second)
  fmt.Println("Main: end")
}

執行結果:

這裡有我以前寫的另外的範例.
https://ithelp.ithome.com.tw/articles/10158450?sc=pt

也可以這麼做

package main

import (
	"fmt"
	"time"
)


var message chan string

func Bot() {
	for {
	
		msg := <-message
		fmt.Printf("Bot Print:%s\n", msg)	
	}

}

func main() {
	//這裡為宣告 5 個 channel buffer，意思就是可以quene 5個 string
	message = make(chan string, 5)

	go Bot()

	message <- "first message"
	fmt.Println("first message send finish")
	message <- "second message"
	fmt.Println("second message send finish")

	fmt.Println("end")
	
	time.Sleep(5 * time.Second)
}

go Bot()照底下寫法
執行完 bot()就會完全結束
記得要加 for 讓他一直在執行中
(沒資料時,它會阻塞...也就是卡住,等待資料)

func Bot() {
	msg := <-message
	fmt.Printf("Bot Print:%s\n", msg)
}