C++ Gurus

@AnneRanch my own habit. If list_item is not changed in the loop, you can add a const to enforce it. If anything of list_item is changed by accident, the compiler will tell it is wrong. But maybe no big deal in your app. Up to you.

@kshegunov

Thanks a lot :)

@AnneRanch
Mark this thread as solved then!

@SamiV123 , @JoeCFD @JonB @jsulm

Thank you

i compiled it successfully using qmake.

@AnneRanch said in Another "reuse" question:

**this message does not show anywhere**

auto pC = new Console; // Original class auto pSB = new QStatusBar; // Additional status bar auto layout = new QVBoxLayout; layout->addWidget(pC); layout->addWidget(pSB); auto consoleWithStatusBar = new QWidget; consoleWithStatusBar->setLayout(layout); consoleWithStatusBar->show(); pSB->showMessage(" TEST status bar message ");

@inglis-dl adding: also tried variations on -I and -L path names such as / or \ separators as well as adding paths to windows system PATH envar

@JonB said in TEMPLATE = lib ?:

that is not to do with you including or not including .h files in .cpp files.

That has been discussed and concluded TRUE.
Let's move on...

It is to do with your code actually calling a function in another .o file and that not being passed to the linker to resolve.

That is NOT the case - I have described how I use "add library"
to add it to subproject .pro file - who is using it.

Let's move on...

I suspect the link to .so IS THE issue...

@jdent
As @Christian-Ehrlicher says, who knows, behaviour may be compiler-specific and it does not claim to check everything, I think. My own guess is that the call to showing the dialog avoiding the detection may well be "coincidence", nothing to do with the specific call, many other things might cause it to skip.

Under Ubuntu, Qt 5, gcc and .pro file having

CONFIG+=sanitizer CONFIG+=sanitize_address

it does report a SIGABRT on code like yours, whether I put in a QDialog and/or exec() or not. I do not know whether you can use those CONFIG lines from Qt with MSVC or not.

One tiny thing: just in case MSVC is "optimizing out" your x code completely because it has no effect (e.g. gcc warns "unused variable"), add something which uses x after your code.

@AnneRanch UPDATE / GOTCHA
When reusing (C++ "feature") project in subproject one better change / rename "MainWindow" class name. .

I start with renaming the existing class header file. QtCreator gives an option to rename both .cpp and .ui
BUT you must start with renaming the header file FIRST.

Then you can rename the MainWindow class and that will change the "object" name in .ui file! l

Another "GOTCHA" - the #include ui_ file , generated from .ui file MUST be changed manually !

Good luck...

@ItsRhysNotRhys
In order to get from

Printing Queue: 4 5 0

to

2 left in queue inside moveElevator1 Printing Queue: 3 5 0

something outside the code you are showing us (maybe in whatever issues two of those message lines) is writing 3 to queue[0]. Either directly, or just possibly through buffer over/underflow writing to another member variable adjacent to int queue[20] .