What are exceptions in C++ and how do I use them?

What are exceptions in C++ and how do I use them?

Exceptions in C++ are a way to handle errors or unexpected events in your program. You can use try, catch, and throw keywords to manage them.

Can you give me an example of how to implement exceptions?

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");
    }
}

int main() {
    try {
        checkValue(-1);
    } catch (const std::invalid_argument& e) {
        std::cout << "Error: " << e.what() << std::endl;
    }
    return 0;
}

What happens if I don't catch an exception?

If you don't catch an exception, it will propagate up the call stack. If it reaches the main function without being caught, the program will terminate.

Are there best practices for using exceptions in C++?

Yes, some best practices include using exceptions for exceptional cases only, not for regular control flow, and ensuring that your catch blocks are specific.