[Go语言]我的第四个Go语言程序

Exercise: Fibonacci closure

Let's have some fun with functions.

Implement a 

fibonacci

 function that returns a function (a closure) that returns successive fibonacci
numbers (0, 1, 1, 2, 3, 5, ...).

package main

import "fmt"

// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func() int {
a, b := 0, 1
return func() int {
r := a
a, b = b, a + b
return r
}
}

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