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I'm trying to pipe a cv::mat variable from one C program to an other they are independent of each other.

I already create a basic code sourced from forums and search, I have 2 programs, writer.c and reader.c.

The writer.c have a cv::mat img variable in it and I need pipe it to reader.c cv::mat img to be showed up with imshow();

I'm merging code from multiple sources hoping this work, because I can find a working sample

My sources:

https://stackoverflow.com/a/2789967/11632453

https://stackoverflow.com/a/30274548/11632453

https://unix.stackexchange.com/questions/222075/pipe-named-fifo

https://stackoverflow.com/a/36080965/11632453

This is my evolution until now:

Code from file writer.c

I am creating a post form-data request with 10 to 15 images in them. to minimize the code, I am using QList in order to store the location of the images

Ihave tried changing QList * files = new QList to QList files but i am getting an error

How do I need to define a constructor such that i can construct a class A like A({a,b,c}). This arised in an urge to avoid using a variadic constructor which seems dangerous.

Code:

Could anyone please help me why I am getting this deleted function error even though I am passing parameters as pointer references (*&) ? This is a simple project working with multithreading in Qt, I just want to experiment sharing and modifying objects between parent and child threads. I am new in Qt, I am using Qt 5.9.2 with GCC 4.9.4 on Ubuntu Linux 14.04.

Thanks in advance.

I'm trying to connect a QML signal to C++ slot. but when I go forward using Qt guide, it occurs two errors:

file:///home/muhammad/Documents/qt_projects/build-Plaq-Desktop_Qt_5_8_0_GCC_64bit-Debug/qrc:/main.qml: No such file or directory

QObject::connect: Cannot connect (null)::qmlSignal(QString) to PlaqueFinder::cppSlot(QString)

and this is my code in main.cpp: