Re: Getting cout<<fixed to work.
"John Carson" <jcarson_n_o_sp_am_@netspace.net.au> wrote in message
news:uTfgPcjrGHA.1508@TK2MSFTNGP04.phx.gbl...
"cmay" <cmay@walshgroup.com> wrote in message
news:1153631509.740033.176490@s13g2000cwa.googlegroups.com
Hello,
I am trying to write a very very very simple program with VC++ 6.
I have the following headers:
#include "stdafx.h"
#include "cmath"
#include "iostream.h"
#include "iomanip.h"
then trying to use:
cout << fixed
will produce the error
'fixed' : undeclared identifier.
This is after having turned off the "use precompiled headers".
Before, when I did have the use precompiled headers, using fixed
would compile, but it would actually write out a hex value when you
did count << fixed. Specifically, it would write 0x00401073.
I found that using setiosflag(ios::fixed) will work, but why doesn't
the normal fixed work?
Also, can anyone explain pre compiled headers, and why I need the
include "stdafx.h" and "using namespace std;" when nothing in my books
show these lines? I'm guessing its a VC++ thing, but can I do without
them?
Your compiler is old and your books are apparently even older.
C++ was standardized in 1998 and VC++ 6 is based on a draft of that
standard. It is non-standard in many respects, including the form of the
standard library and the way it handles templates.
Not entirely true. V6 comes with both a "traditional" C++ library,
with headers like iostream.h, and a (very close to) standard C++
library, with headers like iostream (and cmath, BTW). So you can
write:
#include <cmath>
#include <iostream>
#include <iomanip>
using namespace std;
After which:
cout << fixed
does what you think it does.
P.J. Plauger
Dinkumware, Ltd.
http://www.dinkumware.com