golang函数闭包实现波费纳契数列

直接看代码：

package main

import "fmt"

func fibonacci(s1, s2 int) func() int {
 fmt.Println("start with:", s1, s2)
 left := s1
 right := s2
 return func() int {
 nest := left + right
 left = right
 right = nest
 return nest
 }
}
func main() {
 f := fibonacci(0, 1)
 for i := 0; i < 10; i++ {
 fmt.Println(f())
 }
}