golang 协程+channel+select 实现最简单的斐

main.go 代码如下：

package main

import "fmt"

func feobonaqi(c, quit chan int) {

    x, y := 1, 1

    for {
        select {
        case c <- x:
            x = y
            y = x + y

        case <-quit:
            fmt.Println("listen quit")
            return
        }
    }

}

func main() {
    c := make(chan int)
    quit := make(chan int)

    go func() {
        for i := 0; i < 20; i++ {
            fmt.Println(<-c)
        }

        quit <- 0
    }()

    feobonaqi(c, quit)

    fmt.Println("main process exit")
}