How do I throw exceptions in C++?

How do I throw exceptions in C++?

In C++, you can throw an exception using the throw keyword followed by an instance of an exception class.

Can you give me an example of throwing an exception?

Sure! Here's a simple example:

#include <iostream>
#include <stdexcept>

void checkValue(int value) {
    if (value < 0) {
        throw std::invalid_argument("Negative value not allowed");
    }
}

What happens if I don't catch the exception?

If you don't catch the exception, the program will terminate and display an error message.

How can I catch exceptions in C++?

You can catch exceptions using a try block followed by a catch block. For example:

try {
    checkValue(-1);
} catch (const std::invalid_argument& e) {
    std::cout << e.what() << std::endl;
}