Update bell_inequalities.cpp

[umer066]

The std::array provides bounds checking and safer indexing than raw arrays

Reduces unnecessary std::cout calls

[vsoftco]

Thanks! Need a slight change (see lines below, starting around line 74), otherwise disp won't work (as before, we were using pointer manipulators, and now we need Container manipulators). Also, please #include <array> at top of file.

std::cout << "QS: "
              << disp(statistics[0], IOManipContainerOpts{}.set_sep(" ")) << " "
              << E[0] << '\n';
    std::cout << "QT: "
              << disp(statistics[1], IOManipContainerOpts{}.set_sep(" ")) << " "
              << E[1] << '\n';
    std::cout << "RS: "
              << disp(statistics[2], IOManipContainerOpts{}.set_sep(" ")) << " "
              << E[2] << '\n';
    std::cout << "RT: "
              << disp(statistics[3], IOManipContainerOpts{}.set_sep(" ")) << " "
              << E[3] << '\n';

[umer066]

Hi
I added the changes. Please check it

[umer066]

Thanks for reviewing and approving my PR! Since I don't have merge permissions, could you please merge it when convenient? Let me know if any further changes are needed.