GO : 斐波纳契数列

package main

import "fmt"

// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func() int {
    pre := 0
    cur := 0
    return func() int {
        if pre == 0 && cur == 0 {
            pre = 1
        } else {
            temp := cur
            cur += pre
            pre = temp
        }

        return cur
    }
}

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