How to run a C++ code in Qt?

jsulm

Please take a look at error messages you get:

"\\home.org.a\ab\data\Documents\Qt projects\PS7\main.cpp:1060: error: C2664: 'void PSError(char *)': cannot convert argument 1 from 'const char [37]' to 'char *'' in main.cpp file.

Now check the code lines mentioned in these error messages. Error message you posted tells you that you are passing a const char array to a function that takes a non-const char*. This is not allowed.

Rela

But previously it did not give that error, when I did the same with different versions of Qt5.5 and MCVS 2013. The number of errors

 cannot convert argument 1 from 'const char [37]' to 'char *''

is about 12-13.
However, when I change the

#include <tchar.h>

to

#inclu```de <char.h>

in "stdafx.h" file, the error decreased to two including

\\home.org.a\ab\data\Documents\Qt projects\PS7\stdafx.h:11: error: C1083: Cannot open include file: 'char.h': No such file or directory

errors.

Rela

Could you please reply me?

the_

@Rela

I don't remember that there is any char.h file.

Rela

@the_
Thanks, could you please read my last 6 previous posts?

Rela

I did the same process to read the C++ project in Qt Creator, but this time the error is ```

:-1: error: dependent '..\C++' does not exist.

These are my C++ project files:
O_PS.H
stdafx.h
targetver.h
O_PS.CPP
ps.cpp
stdafx.cpp

and I built a mainwindow Qt creator project (PS8) and copied all the files in the Qt folder except "ps.cpp" and "O_PS.CPP". The copied ones were added to the Qt project using "Add Existing Files". There are some differences including:
1- The "ps.cpp" contains only ```

#include "stdafx.h"

which was added to "mainwindow.cpp".
2- "O_PS.CPP" content was copied in the "main.cpp" of the Qt project. The Qt PS8 project now includes these files.

SGaist

I'm going to repeat myself but: why not just start from a clean Qt project, copy the code you need to run over in that project and go on ?

You have some core logic in that visual studio project but rather than just take the current working code and move it over to your Qt project with maybe some adaptations, you are trying to grab every bits of that project and mix it with your Qt project when there's no real need.

Rela

@SGaist
I almost did the same, except I added the files "stdafx.h", "targetver.h", "stdafx.cpp", and "O_PS .H", which I think are needed. Because in this C++ code, only the "O_PSA .H" and "O_PS .CPP" include code.
The content of "stdafx.h" is #include```

 "targetver.h"
#include <stdio.h>
#include <tchar.h>

The content of "targetver.h" is ```

#include <SDKDDKVer.h>

The content of "stdafx.cpp" is ```

#include "stdafx.h"

And the content of "po .cpp" is ```

#include "stdafx.h"

But, if you mean I just copy the "O_PSA .H" and "O_PS .CPP" codes in "mainwindow.h" and "main.cpp", (here is the Qt project it gives many errors, and I think because all cpp and header files are necessary.

SGaist

You have to fix the includes in your O_PS* files so add the missing #include <stdio.h>

Rela

@SGaist
Do I add #include <stdio.h> to "mainwindow.h" ? I added to all files one by one , but the same errors happen.
Do I need to add #include "stdafx.h" or something else also?

SGaist

No, include them in your O_PS* files where suited.

Rela

@SGaist
I copied the "O_PSA .H" and "O_PS .CPP" code in the "mainwindow.h" and "main.cpp" of the Qt project respevtively. I did add ```

#include <stdio.h>

in either "mainwindow.h" or "main.cpp" files, but it gave the same errors

kshegunov

@Rela
It must have taken you ages to delete those names ... Anyway, to use ostream, istream and other streams from the standard C++ library, you actually need to include the corresponding headers - stdio.h simply won't cut it. You need (depending on which classes you use) one of the *stream headers, e.g. #include <iostream>, #include <fstream> and so on. Additionally, these classes come in the std namespace so you'd need to expand that as well, for example.

#include <iostream>

using namespace std;

// Only now the istream and ostream classes are available.

Kind regards.

Rela

@kshegunov
There are

using namespace std;
#include <iostream>
#include <fstream>
#include <ostream>

in the "main.cpp" already. I added ```

#include <stdio.h>

in each file, but it gave the same error.

kshegunov

@Rela said:

There are ... in the "main.cpp" already.

But obviously these headers are not present in mainwindow.h, whence the compile errors. The compiler doesn't know heck about ostream when processing the mainwindow.h and it's whining ...

Kind regards.

Rela

@kshegunov
Thanks. Do you know what else I can do except adding ```

#include <stdio.h>

to the "mainwindow.h"?

kshegunov

@Rela

Add the aforementioned headers to the mainwindow.h:

#include <iostream>
#include <fstream>
#include <ostream>

using namespace std;

Otherwise the compiler will not know what ostream is.

Rela

@kshegunov
Done, but here are the errors cleaned again ;)

kshegunov

@Rela
I'm sorry but I have no idea what's happening, with the deletions and without a complete code snippet this is just turning into a guessing game. Not to mention the preprocessor directives, whose expansions I have no way of deducing. The errors have obviously changed and they are at compile-time, so focus on that and try to resolve the type mismatches.

Rela

@kshegunov
The problem is not related to the code. The C++ code works properly in MV and also it worked in Qt creator before and gave the results in "Application Outputs" with Qt5.5 and MV 2013. The problem happened, when I start working with MV 2015 and Qt5.6 beta.
I just did the previous way and added all C++ files to the Qt project files. Do you have any idea about the ```

error: dependent '..\C++' does not exist.