Use Qt for a Dialog in Solaris studio

Huamin · 05-31-2012, 03:50 AM

Hi,
Why can’t I use “ShowMessage” in my Solaris studio?

Many Thanks & Best Regards,
HuaMin

pan64 · 05-31-2012, 04:39 AM

Why? What have you tried and what's happened?

Huamin · 05-31-2012, 05:53 AM

Thanks. Why do I get this problem
"main.cpp", line 21: Error: The function "ShowMessage" must have a prototype.
1 Error(s) detected.

to this line?
ShowMessage("Hello");

Nylex · 05-31-2012, 06:22 AM

It looks like you're not including the header that provides the prototype for that function. Can you provide the rest of your code, please? We don't want to have to guess.

Also, please try to use more descriptive thread titles in future. Something like "Solaris Studio C++: The function ... must have a prototype" would have been better.

Huamin · 05-31-2012, 06:27 AM

Thanks a lot. I've put these in the beginning of my codes.

#include <cstdlib>
#include <list>

using namespace std;

int main(...
...

Nylex · 05-31-2012, 06:34 AM

OK, so you need to include the header that contains the signature for ShowMessage(). If this ShowMessage() function is in the same file as main(), then you have two options.

1. Put the function before main():

Code:

ShowMessage()
{
  ...
}

int main()
{
  ...
}

2. Leave the function after main(), but include a prototype, e.g.

Code:

void ShowMessage();

int main()
{
 ...
}

void ShowMessage()
{
 ...
}

Is this not covered in the book/tutorial you used/are using to learn C++?

Huamin · 05-31-2012, 06:38 AM

Thanks a lot. In Visual C++, there is one given function like MessageBox. Do we have the equivalence for it in Solaris studio C++? Before this, I thought ShowMessage is the equivalent one for MessageBox.

Best Regards

Nylex · 05-31-2012, 06:41 AM

I don't know, as I've never used Solaris Studio. Perhaps check their documentation. As an aside, you might want to also consider using, e.g. Qt to generate dialog boxes. At least that way, it'd be more portable between compilers.

Huamin · 05-31-2012, 06:43 AM

Thanks. Is Qt also supported in Visual C++ or not?

Best regards

Nylex · 05-31-2012, 06:47 AM

It looks like Qt supports Visual C++, yes. If you don't know anything about Qt, it's a whole "application framework" that provides with the ability to do, e.g. multi-threading, database access, as well as GUIs. There's more info on the Qt website.

Huamin · 05-31-2012, 08:50 PM

Good day Nylex,
When I tired to put this
#include <QDialog>

I’ve got this. What Qt library should be download?
"main.cpp", line 10: Error: Could not open include file<QDialog>.

Many Thanks & Best Regards,
HuaMin

Nylex · 05-31-2012, 11:53 PM

Did you try installing Qt already? Obviously it's not going to be on your system if not. Obviously, as well, you need to tell the compiler where to find the headers and library files.

See the download page here. I assume the Windows online (or offline) installer is what you want. You might want to install the Visual Studio add-in as well, though I don't know as I don't use Windows.

Huamin · 06-01-2012, 12:23 AM

Thanks.
No, all are done within Red hat, as Solaris studio is for Linux & Unix only.

Nylex · 06-01-2012, 01:51 AM

The Qt installation on your system was likely compiled with the GNU compiler. I've never tried, but I don't know whether it's possible to make use of libraries built with a different compiler. One issue you may have is to do with name mangling (see the Wikipedia article on it). So, this may mean you need to first build Qt with Solaris Studio. Is there a reason for you not to use g++?

Also, is it possible to edit your thread title? If not, ask a mod to do it. Hopefully that will help attract someone more able to help you.

Huamin · 06-01-2012, 02:44 AM

Thanks a lot Nylex.
Moderator,
Can you please change the title of this to be

Use Qt for a Dialog in Solaris studio

Nylex,
What is g++?

Many Thanks & Best Regards,
HuaMin