go语言实现斐波那契

package main

import (
	"fmt"
	"runtime"
)

func fibonacci(ch <-chan int,quit <-chan bool){
	for{
		select {
		case num:=<-ch:
			fmt.Print(num," ")
		case <-quit:
			// return
			runtime.Goexit() //等效于return
		}
	}
}

func main() {
	ch := make(chan int)
	quit := make(chan bool)

	go fibonacci(ch,quit)  // 子go程,打印

	x,y := 1,1
	for i:=0;i<20;i++{
		ch <- x
		x,y=y,x+y
	}

	quit <- true
}