Missing include file <qstd.h>

[Ilia]

Hi Everyone, This would be my first time using a programming forum - so appolagies for my noobness in advanced!!

I am learning Qt4 on Windows with the book "Introduction to Design Patterns in C++ with Qt4" which seems popular.

One of the problems introduces "namespace qstd;". From what I have read, this namespace requires an include file <qstd.h>. When i Add the following line of code into my program;

using namespace qstd.h
I get the following Error:

qstd.h: No such file or directory
After searching for qstd.h throughout my Qt directories, it seems that I dont have this header!! This seems bizzar to me =?

can anyone can point out some serious flaws in my methods (which I know is likley) ?? Otherwise if this all seems legit, I would very much appreciate if someone could send me the header file (couldnt find one with a basic google search)

thanks a lot for your time.
Ilia

[ChrisW67]

#include "qstd.h"
using namespace qstd;

#include "qstd.h"
using namespace qstd;

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The content of qstd.h is in example 20.12 of my copy of the book... it is not part of Qt.

[Ilia]

Thanks for the response, it was what I was looking for!

[Ali Reza]

namespace is name of a code block and by command using namespace you can declear a block of codes that have a specific name.
Example:

namespace myns
{
int num;
}

namespace myns
{
int num;
}

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in other places you can use this integer variable by follow:
for ex:

myns::num=12;

myns::num=12;

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