我应该在代码中进行哪些更改以生成从0 1 1开始的斐波那契数列

Question

I've searched older questions, there are tons of them. However I couldn't find the answer to my case.

func fibonacci() func() int {
    y := 0
    z := 1

    return func () int {

        res := y + z
        y = z
        z = res

        return res

    }
}

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

This produces 1 2 3 5 8

What should I change (as little as possible) to get 0 1 1 2 3 5 8 ?

Actually I managed to solve that if initial y and z were like this:

    y := -1
    z := 1

But that's a fortunate hack, and I want a logical solution.

Answer 1

Change your function to return res to this:

 return func () int {

    res := y
    y = z
    z = res + z

    return res

}

This way you output the initial values first, and calculate the next values. Your current solution overwrites the initial values before they are returned.