why I can't use the words min and max as variable names?

Question

In this C++ program the function print_nums doesn\'t accept the vector numbers as an actual prameter when called in the switch

Answer 1

You use using namespace std; (get out of that habit) which means that std::min and std::max are pulled in from the std namespace into the global namespace. That is why you can't then use those names in your own code, since they have already been defined.