From: Glenn Jackman <glennj@...>
Date: 2009-07-28T04:15:08+09:00
Subject: Re: Help me with this program

At 2009-07-27 02:07PM, "Prateek Agarwal" wrote:
>  Woah, this is my 3rd post in like an hour. Must be really annoying for
>  the guys who are answering.
>  Well, in this program after inputting the value the program doesn't
>  respond or do anything. On pressing 'ctrl+c', it shows some 'interrupt'
>  error.
>  
>  Thanks for your help. I am still in the very basic stage of ruby.
>  
>  Attachments:
>  http://www.ruby-forum.com/attachment/3907/Question1.rb

You'd better not use k == 0.  You'll hit an infinite loop in add()
You might want to use:  if i >= k then ...

Add more trace statements while testing.

Here's a version without the "loop" statements

    def factorial(x)
      result = 1
      x.downto(2) {|i| result *= i}
      result
      # or:
      # (1..x).inject(1, :*) 
    end

    def power(a,b)
      result = 1
      b.times {result *= a}
      result
      # or simply:
      # a ** b
    end

    def add(k)
      sum = 0.0
      k.times do |i|
        n1 = factorial(4*i)
        n2 = 1103+(26390*i)
        d1 = power(factorial(i),4)
        d2 = power(396,(4*i))
        sum += 1.0*(n1*n2)/(d1*d2)
      end
      sum
    end


-- 
Glenn Jackman
    Write a wise saying and your name will live forever. -- Anonymous