Rails - Aug 2011 - What Is Wrong With Code - I am beginner- Time Limit Exceed Problem

# To change this template, choose Tools | Templates
# and open the template in the editor.

puts "Hello World"
def squareroot(a)
  u=a
  l=0
  while (l<=u)
    m = l + (u-1)/2
    if (m**2) < a
        l = m + 1
    elsif (m**2) > a
      u = m-1
    elsif
      m**2 == a
      return m
    else
      return l-1


    end
  end
end
x = squareroot(55)
print x


Rahul

-- 
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en.

On 14 August 2011 05:56, Rahul
<raikrahul-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> # To change this template, choose Tools | Templates
> # and open the template in the editor.
>
> puts "Hello World"
> def squareroot(a)
>   u=a
>   l=0
>   while (l<=u)
>     m = l + (u-1)/2
>     if (m**2) < a
>         l = m + 1
>     elsif (m**2) > a
>       u = m-1
>     elsif
>       m**2 == a
>       return m
>     else
>       return l-1
>
>
>     end
>   end
> end
> x = squareroot(55)
> print x
I guess it is never coming out of your while loop.  Have a look at the
Rails Guide on debugging to find out how to break into code using
ruby_debug and see what is going on.  Also you could try putting some
write statements in the function to see what is happening.

Hint: It may not help but what happens if you try squareroot(55.0)?
If that helps make sure you understand why (using debug or print
statements).

Colin

-- 
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en.

On 14/08/11 05:56, Rahul wrote:
> # To change this template, choose Tools | Templates
> # and open the template in the editor.
>
> puts "Hello World"
> def squareroot(a)
>    u=a
>    l=0
>    while (l<=u)
>      m = l + (u-1)/2
        puts "u = #{u}, l = #{l}, m = #{m}"
>      if (m**2) < a
[snip rest of code]

Try adding in that extra line of code and I think you might understand 
your logic error.

HTH
John

-- 
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en.