From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2010-08-01T08:13:09+09:00
Subject: Re: Argument Error

On Sat, Jul 31, 2010 at 11:46 PM, Hd Pwnz0r
<human.dictionary@rocketmail.com> wrote:
> Hi.
>
> I'm learning Ruby and I want to know how to make a script have an
> argument, i.e.
>
> ruby script.rb 3 2
>
> So far I have this:
>
> abort "Correct syntax is ruby [script].rb [number to exponentially
> multiply by] [exponent]" unless ARGV.size == 2
> var = gets.chomp
> var2 = gets.chomp

You have the program arguments in the ARGV array, as you probably
know, since you've used it in the previous line:

var = ARGV[0].to_i
var2 = ARGV[1].to_i

(I've added the to_i, since it seems you want to use them as numbers)

> puts  (var.to_i ** var2)
>
> It's a simple exponential calculator.
>
> I get this error when trying to run it with 2 arguments (2 and 3).
>
> exponent.rb:2:in `gets': No such file or directory - 2 (Errno::ENOENT)
> from exponent.rb:2:in `gets'        from exponent.rb:2:in `<main>'

Jesus.