C++ catch(std::exception & e ) vs. catch(…)

Question

I know the difference in handling of both of these catches, but what does it take for the ellipse to catch something the std::exception catch wouldn\'t catch?

For ex

Answer 1

You probably meant:

throw std::runtime_error("runtime error!"); // not std::runtime

The std::runtime_error is derived from the std::exception so your first catch block is fired up as it catches exceptions of type std::exception. And there you probably meant:

std::cout << "Exception: " << e.what(); // not e

If you threw anything else other than the std::run_time or std::exception and its derivatives, the second catch block would be triggered. Useful reading from the C++ FAQ: What should I throw?