[GO]使用select实现斐波那契

package main

import "fmt"

func fibonacci(ch chan <- int, quit <- chan bool)  {
    x, y := 1, 1
    for true {
        select {
        case ch<-x:
            x, y = y, x+y
        case flag := <-quit:
            fmt.Println("flag = ", flag)
            return
        }
    }
}

func main() {
    ch := make(chan int)
    quit := make(chan bool)
    go func() {
        for i:=0; i<8; i++ {
            num := <-ch
            fmt.Println("num = ",num)
        }
        quit <- true //可以退出，即给quit赋了一个值，之前都是一直在阻塞
    }()
    fibonacci(ch, quit)
}

执行的结果

num =  1
num =  1
num =  2
num =  3
num =  5
num =  8
num =  13
num =  21
flag =  true