Hi,

I've just downloaded digital mars and have started to play around with it. So far I like what I see except that it seems that I have to use the old-style way of including headers. So, for example:

#include <iostream.h>
int main() {
    cout << "hello\n";
    return 0;
}

compiles whereas:

#include <iostream>
using namespace std;
int main() {
    cout << "hello\n";
    return 0;
}

does not. The compiler says 'unable to open input file iostream'. I'm wondering if dm simply does not support the newer way of including files or if the problem lies in my setup. I'm using dm version 8.26n on windows 2000.

Thanks in advance,

Richard.

Richard Johnson wrote:

> Hi,
>
> I've just downloaded digital mars and have started to play around with it. So far I like what I see except that it seems that I have to use the old-style way of including headers. So, for example:
>
> #include <iostream.h>
> int main() {
>     cout << "hello\n";
>     return 0;
> }
>
> compiles whereas:
>
> #include <iostream>
> using namespace std;
> int main() {
>     cout << "hello\n";
>     return 0;
> }
>
> does not. The compiler says 'unable to open input file iostream'.

That's because that file does not yet exist in the package!

> I'm
> wondering if dm simply does not support the newer way of including files or
> if the problem lies in my setup. I'm using dm version 8.26n on windows 2000.

No, as far as I know the newer files are missing...

Jan

"Jan Knepper" <jan@smartsoft.cc> wrote in message news:3C6AFE12.22D13C70@smartsoft.cc...
> Richard Johnson wrote:
>
> > I've just downloaded digital mars and have started to play around with
it.
> > So far I like what I see except that it seems that I have to use the old-style way of including headers.
>>
> > #include <iostream>
> > using namespace std;
> > int main() {
> >     cout << "hello\n";
> >     return 0;
> > }
> >
> > does not compile. The compiler says 'unable to open input file
iostream'.
>
> That's because that file does not yet exist in the package! No, as far as I know the newer files are missing...
>

Surely it's the same file? As I understand it you can include iostream by typing "#include <iostream.h>" but the proper way of doing it is by typing "#include <iostream>".  Whichever method you use you're still talking about the same header file aren't you??

Richard.

> Surely it's the same file? As I understand it you can include iostream by typing "#include <iostream.h>" but the proper way of doing it is by typing "#include <iostream>".  Whichever method you use you're still talking about the same header file aren't you??

AFAIK yes.
iostream could just #include <iostream.h>...

Jan

"Jan Knepper" <jan@smartsoft.cc> wrote in message news:3C6BE6AF.A6092700@smartsoft.cc...
> > Surely it's the same file? As I understand it you can include iostream
by
> > typing "#include <iostream.h>" but the proper way of doing it is by
typing
> > "#include <iostream>".  Whichever method you use you're still talking
about
> > the same header file aren't you??
>
> AFAIK yes.
> iostream could just #include <iostream.h>...
>
> Jan
>
Actually, I've just created an 'iostream' that does just that ;o)

However, I've just realised this still doesn't give me the 'std' namespace - but that's too much like hardwork to sort out right now so maybe I'll forget about namespaces for now...

Richard.

"Richard Johnson" <rich@REMOVETHISBITnorthernsky.uklinux.net> skrev i en meddelelse news:a4dji3$240h$1@digitaldaemon.com...
>
> does not. The compiler says 'unable to open input file iostream'. I'm wondering if dm simply does not support the newer way of including files
or
> if the problem lies in my setup. I'm using dm version 8.26n on windows
2000.
>
> Thanks in advance,
>
> Richard.
>
>

The compiler doesn't seem to support namespaces either?!

#include <iostream>

int main()
{
    std::cout << "Hello World!" << std::endl;

    return 0;
}

This produces errors, when compiled, even if iostream.h is used instead...

Can this be true?? I thought this compiler was good!

/David

Yes, it can be true because of the fact that cout is NOT defined in the std namespace.

Jan



David Rasmussen wrote:

> "Richard Johnson" <rich@REMOVETHISBITnorthernsky.uklinux.net> skrev i en meddelelse news:a4dji3$240h$1@digitaldaemon.com...
> >
> > does not. The compiler says 'unable to open input file iostream'. I'm wondering if dm simply does not support the newer way of including files
> or
> > if the problem lies in my setup. I'm using dm version 8.26n on windows
> 2000.
> >
> > Thanks in advance,
> >
> > Richard.
> >
> >
>
> The compiler doesn't seem to support namespaces either?!
>
> #include <iostream>
>
> int main()
> {
>     std::cout << "Hello World!" << std::endl;
>
>     return 0;
> }
>
> This produces errors, when compiled, even if iostream.h is used instead...
>
> Can this be true?? I thought this compiler was good!
>
> /David

"Jan Knepper" <jan@smartsoft.cc> wrote in message news:3C6C4926.1CAD8B4D@smartsoft.cc...
> Yes, it can be true because of the fact that cout is NOT defined in the
std
> namespace.
>
> Jan
>
It's supposed to be defined in the std namespace though isn't it?

Richard.

"David Rasmussen" <pinkfloydhomer@yahoo.com> wrote in message news:a4hg6h$th4$1@digitaldaemon.com...
>
> The compiler doesn't seem to support namespaces either?!
>
> #include <iostream>
>
> int main()
> {
>     std::cout << "Hello World!" << std::endl;
>
>     return 0;
> }
>
> This produces errors, when compiled, even if iostream.h is used instead...
>
> Can this be true?? I thought this compiler was good!
>
> /David

I think the compiler does support namespaces (in the sense that you can create your own namespaces) but the standard c++ headers have not been placed in the std namespace as they are supposed to be. That's why you can't use std::cout.

Richard.

"Jan Knepper" <jan@smartsoft.cc> skrev i en meddelelse news:3C6C4926.1CAD8B4D@smartsoft.cc...
> Yes, it can be true because of the fact that cout is NOT defined in the
std
> namespace.
>
> Jan
>

So this compiler is not ANSI/ISO compliant in the least bit? According to ANSI/ISO compliance, cout is defined int the std namespace. In practice, this means that most modern, compliant code cannot be compiled with this compiler. That's a shame.

/David