What are the best practices for handling exceptions in C++?

What are the best practices for handling exceptions in C++?

When handling exceptions in C++, it's important to use try-catch blocks effectively, avoid catching exceptions by value, and ensure that resources are properly managed.

Can you explain why I shouldn't catch exceptions by value?

Catching exceptions by value can lead to slicing, where the derived class information is lost, and it can also incur unnecessary overhead.

What should I do in the catch block?

In the catch block, you should log the error, clean up resources, and possibly rethrow the exception if it cannot be handled.

Are there any specific guidelines for using std::exception?

Yes, always derive your custom exceptions from std::exception, and override the what() method to provide meaningful error messages.