From: ishamid <ishamid@...>
Date: 2006-11-28T07:00:07+09:00
Subject: Re: simple loops and recursion


I leave this as a exercise for the reader...

Ok, here is the solution to the exercise :-)

==============
def expect(msg, expected_value)
  puts "#{msg}#{expected_value}:"
  loop do
    actual_value = gets.chomp
    return actual_value.to_i if actual_value.to_i == expected_value
    puts "Sorry, expected #{expected_value} but got #{actual_value}"
  end
end

# expect('We want ', 98) # test

def repeat(msg)
  number_of_bottles = 99
  while number_of_bottles != 0 do
    puts "#{number_of_bottles} bottles: If one falls,
	#{number_of_bottles - 1} bottles."
    number_of_bottles = expect(msg, number_of_bottles - 1)
  end
end

repeat('We want ')
==============

If I input a string, it comes back as a string, and everything else
works too. Thank you again for this lesson!

Now I will study David's approach...

Thnx again and 
Best
Idris