package main

import (
    "flag"
    "fmt"
)

var Fibo Fib

func init() {
    flag.IntVar(&Fibo.ordinalNumber, "get", 1, "The ordinal number of value of Fibo sequence")
    flag.Parse()
}

type Fib struct {
    ordinalNumber, value int
}

func main() {
    Fibo.Find()
    Fibo.Print()
}

func (fib *Fib) Find() {
    var tmp = 1
    for i := 0; i < fib.ordinalNumber; i++ {
        fib.value, tmp = tmp, fib.value+tmp
    }
}

func (fib *Fib) Print() {
    fmt.Println(fib.value)
}