problem with doubles

[Steven Schveighoffer]

"Michael P." wrote
> So I've attached the file for a very simple program I'm working on.
> The problem comes from past contests questions, see this:
>
> http://www.cemc.uwaterloo.ca/ccc/past/previous_contests.shtml
>
> The problem I've having is with 2008 Junior problem 1. Every time with my 
> code it says you are overweight, when it is supposed to say normal weight.
> So I tried printing out the value I was comparing, and it said nan. Anyone 
> know why?
> -Michael P.
>

scanf is a C function.  You need to exactly specify the type in the string, 
so use %lf for double

-Steve