From: Michael Morin <uzimonkey@...>
Date: 2008-09-01T00:12:33+09:00
Subject: Re: simple, array question!

hwang is wrote:
> Stefano Crocco wrote:
>> If you're used to C programming, you can look at 
>> http://www.ruby-lang.org/en/documentation/ruby-from-other-languages/to-ruby-from-c-and-c-/
>> to see a list of the differences between ruby and C/C++
>>
>> I hope this helps
>>
>> Stefano
> 
> thank you crocco.
> 
> i understand your explanation.
> 
> However, c language speaking..
> int input[100];
> for(i=0;i==100;i++)
> {
> scanf("%d",input[i]);
> }
> 
> This code is written in Ruby How do I
> 
> thank you..
> and, sorry.. i can't speak english well

Ruby arrays are not like C arrays.  They don't have a fixed size, they 
can change size depending on what you add to or remove from them.  For 
example, creating an array with 100 elements isn't often done in Ruby. 
You can do it with Array.new(100), but it's just not necessary.  Empty 
arrays are created either with the empty array literal [], or by calling 
the Array constructor with Array.new.

The code you posted can be done like this:

input = []  # Create an empty array
100.times do
   # Read from keyboard and append to array using the << operator
   # gets reads a line
   # chomp removes the newline (from the enter key)
   # to_i converts from a string like "10" into an integer like 10
   input << gets.chomp.to_i
end

-- 
Michael Morin
Guide to Ruby
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