send_rece_channel.go

package main

import (
	"fmt"
	"time"
)

func sender(out chan<- int) {
	for {
		time.After(1 * time.Second)
		out <- 1
	}
}

//   <-chan //只读
func receive(in <-chan int) {
	for {
		select {
		case <-in:
			fmt.Println("in")
		}
	}

}

func main() {
	c := make(chan int) //   chan   //读写

	go sender(c)
	receive(c)

	fmt.Println("done")
	<-time.After(1 * time.Hour)
}