How to set an argument to run a class file using QProcess?

Question

I was wondering if there is a way to use QProcess to start the main.cpp of another class to enter into its execution as such

QProcess *myProcessA = new QProcess();
myProcessA->start("*Anotherclass*main.cpp");

I can start applications and other executable arguments via QProcess, but the reason is I am integrating an external application (not written in C++) into a widget in Qt.

I can launch the external app via QProcess fine, but to embed it I need to launch it in another main thread that would hold the process I already created and sync them.

Sounds confusing but please my question is just plain and simple:

QProcess *myProcessA = new QProcess();
myProcessA->start("*Anotherclass*main.cpp");

Or better still, how to set an argument/path to run a class file using QProcess?

You cannot run source code, you must compile it to create a separate program, then launch the executable... — cbuchart, Jul 03 '18 at 14:58

score 3 · Answer 1 · answered Jul 03 '18 at 15:50

You cannot run C++ source code using QProcess, in a similar way that you cannot run it from a shell or file explorer. You must compile it first to create a separate program. Once compiled, launch the executable created using QProcess similarly as how you've been doing:

QProcess *myProcessA = new QProcess();
myProcessA->start("the_exec.exe"); // extension assuming Windows

How to set an argument to run a class file using QProcess?

1 Answers1