• Michael P. <baseball.mjp gmail.com> Aug 10 2008
• "Steven Schveighoffer" <schveiguy yahoo.com> Aug 10 2008
• Michael P. <baseball.mjp gmail.com> Aug 10 2008
• "Jarrett Billingsley" <kb3ctd2 yahoo.com> Aug 10 2008

Michael P. <baseball.mjp gmail.com> writes:

Content-Type: text/plain

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.

"Steven Schveighoffer" <schveiguy yahoo.com> writes:

"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 

Michael P. <baseball.mjp gmail.com> writes:

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.

"Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:

"Michael P." <baseball.mjp gmail.com> wrote in message 
news:g7n3i3$bfm$1 digitalmars.com...
 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?


Yes and yes.  I really wish the C library were harder to use from D.  So 
many newcomers end up overusing it and then wonder why they have so many 
issues.

readf is very easy to use.  Just like writef and friends, the function knows 
the type of the argument without having to look at the format string.