What is a C++ std::runtime_error?

What is a C++ std::runtime_error?

A std::runtime_error is an exception in C++ that indicates a runtime error, typically used for errors that can only be detected during program execution.

Can you give me an example of when to use std::runtime_error?

Sure! You might use std::runtime_error when a function receives invalid input that it cannot handle, like trying to open a file that doesn't exist.

How do I throw a std::runtime_error in my code?

You can throw a std::runtime_error by using the 'throw' keyword followed by an instance of std::runtime_error, like this: throw std::runtime_error("Error message");.

What should I catch it with?

You should catch it using a try-catch block, like this: try { /* code / } catch (const std::runtime_error& e) { / handle error */ }.