grabCut isn't cutting out the background..... (C++)

[crackwitz]

may I suggest that you give your code some formatting? there’s a button for that. select the code and click the button.

related:

Can't find docs on grabCut..... (Hair segmentation) (C++)

So I want to make a software that will segment hair and color it to a different color, I want to do it in C++, I also want to use grabCut, but I can’t find any docs on grabCut for C++, only plain code or docs for python, could anyone provide me with a tutorial or with docs for grabCut??? Also, if you think that there is a better way to do this project, I am open to suggestions… I only ever did facial recognition in C++ openCV… Thank you in advance…