From: Nuggety Nanna <lists@...>
Date: 2012-12-05T20:17:48+09:00
Subject: Re: Vectors & Surds in Ruby

Jan E. wrote in post #1087901:
> Unless there are other specifications that you didn't tell us, this is
> nonsensical.

Thanks for that, I wasn't aware that the "require matrix" was necessary. 
As for the surds, I am finding the square root of a set of values, and 
want the answer as an exact value, rather than a float. My code is 
below:

begin
puts "Do you want the length of Vector A or Vector B?"
answer = gets.chomp.downcase
end until answer == "a" || answer == "b"

  if answer == "a"
    len_vect_A = Math.sqrt(vect_Ax ** 2 + vect_Ay ** 2)
    puts "The length of vector A is #{len_vect_A.round(3)}"

  else
    len_vect_B = Math.sqrt(vect_Bx ** 2 + vect_By ** 2)
    puts "The length of vector B is #{len_vect_B.round(3)}"
  end

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