problem with doubles

[Michael P.]

Steven Schveighoffer Wrote:

> "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 
> 
> 


Thanks, that worked.
BTW, I know that readf is the D equivalent of scanf(right?), but I don't know how to use it. 
I should be using readf and writef instead of scanf and printf right?

-Michael P.