Multiple programs launched

When running a simple C++ OpenGL project in Xcode, multiple instances of the program are created and launched by Xcode when I build and run...I am not sure why it happens, does anyone know how can I stop this?

How are you determining that multiple instances are running? I suspect that there aren’t, and instead something in the UI is misleading you.

If you go to Activity Monitor, do you see multiple instances there?

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