How to run a C++ code in Qt?

[SGaist]

I didn't realize… You changed Visual Studio's version in between. On Windows you can't mix and match compilers and libraries, Visual Studio's compilers are not compatible one with the other. So since you have the MSVC2013 Qt package, you have to use Visual Studio 2013 with it.

If you want to use Visual Studio 2015, you can either build Qt yourself, or go with the 5.6 beta which has VS2015 packages.

[Rela]

@SGaist said:
Thanks, which one do you recommend? I spent a lot of time on lunching and problem with running my programs until now because of components and compilers. If I uninstall 5.5 and install 6.5. beta, does Qt 6.5. work conveniently with Qt5.5. projects?

[SGaist]

You're too much in the future ;) It's 5.6

No problem using Qt 5.6 for project started with 5.5. Forward compatibility is one of Qt's guaranties.

[Rela]

@SGaist
I was going to uninstall it by opening "Maintenancetool.exe" > "Remove all components" but it gives this error in 92%...

[SGaist]

Unusual, but why not just update ?

[Rela]

@SGaist
I was going to work with Qt 5.6 beta with MVS2015. To have Qt 5.6 beta can I just update Qt 5.5? I clicked on update components in "Maintenancetool.exe" , is this the component I need?

[SGaist]

No, that's Qt Creator. It's the IDE.

IIRC, the 5.6 beta installer is available through your Qt Account page

[Rela]

@SGaist
If you mean through this link, the Qt5.5 should not be uninstalled first?

[SGaist]

There's also that link indeed. Since it's an offline installer, I don't remember whether it will overwrite the Qt folder or not

[Rela]

@SGaist
Is the installation way different from Qt5.5? Why does Qt5.6 give this error, while I installed Qt5.5 in the same folder?

[SGaist]

Don't put Qt in a path with white spaces, that will save you much trouble.

[Rela]

@SGaist
If you mean "program files'' it was the same folder I installed previous Qt5.5 and didnt give any message. By default Qt5.6 beta selects the C drive to install.

[SGaist]

That's what I mean. Avoid white spaces it's the best thing to do on Windows.

[Rela]

@SGaist
Just to be sure which one I need to install?Qt5.6

[SGaist]

The second one unless you are planning to use WinRT

[Rela]

@SGaist
I dont have any idea about that, I was just running a C++ code in Qt and get outputs in UI... how can I know if it was installed before in Qt5.5? Moreover, there is a "_64" difference between the two: qt-opensource-windows-x86-msvc2015_64-5.6.0-beta.exe 17-Dec-2015 and
qt-opensource-windows-x86-msvc2015-5.6.0-beta.exe

[SGaist]

The _64 is to be used if you want to build a 64 bit version of your application. That also requires a 64 bit OS to run.

The Beta doesn't installed itself in 5.5 since it's the 5.6 beta

[Rela]

@SGaist
My system is windows 7 64-bit, and I am going to run a C++ code using Qt with MCVS 2015.
Just to prevent from over or re-installation again, could you please tell me which one I need to install?

[SGaist]

If you plan to only run your application on 64bit Windows, then take the 64bit version otherwise the 32.

[Rela]

@SGaist
I installed the first one here to be able to run my projects using MCVS 2015 compiler. It worked last week. I think I have still the older Qt 5.5. and couldn't uninstall it.
Now I am again trying to run my project, but cannot find the Qt5.6 beta. when I open the Qt shortcut on my desktop, it has only the MCVS 2013 as compiler.
How can I run projects using Qt 5.6 beta shown here and get rid of Qt 5.5?
In addition, when I open the "MaintenanceTool.exe" to update it, this error appears.