go-play / fib.go

package main

import (

func fib(n int) *big.Int {
	a, b := big.NewInt(1), big.NewInt(1)
	tmp := big.NewInt(0)
	for i := 0; i < n-1; i++ {
		b.Add(tmp, b)
	return b

func main() {

	if flag.NArg() != 1 {
		fmt.Println("error: wrong number of arguments")

	n, err := strconv.Atoi(flag.Arg(0))
	if err != nil {
		fmt.Println("error: bad number -", flag.Arg(0))

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