go指南：斐波纳契闭包练习

package main

import "fmt"

// 返回一个“返回int的函数”
func fibonacci() func() int {
    i := 0
    j := 1
    flag := false
    return func() int{
        var res int
        flag = !flag
        if flag {
            res = i
            i += j
        }else {
            res = j
            j += i
        }
        return res
    }
}

func main() {
    f := fibonacci()
    for i := 0; i < 10; i++ {
        fmt.Println(f())
    }
}

func fibonacci1() func() int {
    back1, back2:= 0, 1

    return func() int {
        temp:=back1
        back1,back2=back2,(back1 + back2)
        return temp
    }

}