How do I throw and catch exceptions correctly?

C++ provides a robust mechanism for error handling using exceptions. By using the `throw` keyword, you can signal the occurrence of an error, while the `try` block allows you to attempt a block of code that may lead to an exception, and the `catch` block enables you to handle those exceptions effectively.

Throwing Exceptions

To throw an exception, you use the throw keyword followed by an object that represents the exception. This object can be a built-in type or a user-defined type.

Catching Exceptions

To catch an exception, you use a try block followed by one or more catch blocks that specify the different types of exceptions you want to handle.

Example

#include #include void testFunction(int x) { if (x < 0) { throw std::invalid_argument("Negative value error"); } std::cout << "Value: " << x << std::endl; } int main() { try { testFunction(-1); } catch (const std::invalid_argument& e) { std::cerr << "Caught an exception: " << e.what() << std::endl; } return 0; }

C++ exceptions throwing catching error handling try block catch block std::invalid_argument

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