How to run a C++ code in Qt?

[jsulm]

What is the content of your *.pro file?

[Rela]

Thanks it worked today, the run button was active and gave "Hello world" in widget.
Just I am doing the same with another longer C++ code. I copied all .h and .cpp files to the created Qt project folder and added using
"Add existing file" to Qt .h and .cpp files. But instead of main.cpp in Qt, I copied the .cpp code in my PS C++ project. When I run it it gives more than 10 errors like

"\\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.

I changed the the #include <tchar.h> to #include <char.h> in "stdafx.h" file, but 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"

PS. May I ask why I cannot see my previous posts in this page? I need sometimes to look at them, how can I do that?

[SGaist]

Just to be clear, are you trying to build MSVC generate code with a MinGW build of Qt ?
If so why not just import the code you wrote in your VS project in your Qt project and dump the VS specific files that you anyway will not use in your Qt project ?

If you have the infinite scroll activated, just scroll up otherwise you have a at the bottom a page selector.

[Rela]

@SGaist
I think I wrote by mistake. I am trying to run my C++ project using Qt Widget project.
I have these files VS I copied them in my Qt project folder, and added stdafx.cpp, stdafx.h, targetver.h and O_PS .H to the Qt. Instead of adding "O_PS .cpp" I copied its content to the "main.cpp" in Qt. For "po .cpp" also I just added
#include "stdafx.h" to the "mainwindow.cpp". Now I have these files in Qt: Qt

The errors were explained in the previous post.

[jsulm]

See here: http://stackoverflow.com/questions/4726155/whats-the-use-for-stdafx-h-in-visual-studio
stdafx.h seems to be generated by VS, so you should not use it with MinGW

[Rela]

@jsulm
If I understood your post, I dont run the Qt with MinGW, here I run it using Desktop MCVS 2015 compiler, after adding the path of the input data file to the Run of the MCVS 2015 in the project.

[Rela]

Could you please tell your ideas about my previous question posted 6 days ago?

[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.