Mapping of elemnet in an Array created by Pure C++ to Qt Array that can be used by Qt

I have written a program in c++ and I found that i need a UI like Qt UI. i have so many data and specialy array that contain int values, I want to use these values to plot by using the plotter, the problem when i use those values it gives an error those aren't qt variable something like that.

Best Regards,

Please post the exact error message you get.

Data elements don't need to be Qt specific, if we are talking natural types like ints floats etc.
You probably are trying to do (call) something in an improper way.
Post some relevant code where the compile error points to.