Exception Handling in C++
Exception handling is an essential aspect of C++ programming, allowing you to gracefully manage unexpected errors and exceptional situations that may occur during program execution.
An exception is an event that disrupts the normal flow of a program. These events can be anything from a divide-by-zero error to running out of memory. When an exception occurs, it can be “thrown” by the program and subsequently “caught” and handled by the code that is capable of dealing with it. Exception handling provides a structured mechanism for dealing with these unexpected events.
In the below PDF we discuss about Exception Handling in detail in simple language, Hope this will help in better understanding.
Exception Handling Keywords:
In C++, exceptions are managed using a combination of three essential keywords: try, throw, and catch.
Try: The try block is where you enclose the code that might throw an exception. It’s the region where you expect the exception to occur.
try {
// Code that might throw an exception
}
Throw: The throw keyword is used to raise an exception explicitly within the try block. You can throw different types of exceptions, including built-in types, objects, or custom exceptions.
throw ExceptionType("Error message");
Catch: The catch block follows the try block and is used to handle exceptions. Each catch block specifies the type of exception it can catch and the corresponding code to execute.
try {
// Code that might throw an exception
} catch (ExceptionType e) {
// Handle the exception
}Exception Types:
C++ supports various types of exceptions. The standard library defines several exception types, and you can also create your own custom exception classes. Commonly used standard exceptions include:
std::exception: The base class for all standard C++ exceptions.
std::runtime_error: Represents errors that can only be determined at runtime.
std::logic_error: Represents errors that can be detected at compile-time.
Related Question
Exception handling is a mechanism in C++ that allows you to gracefully handle errors or exceptional situations that may occur during program execution.
An exception is an object or a value thrown when an error or unexpected situation occurs during the execution of a C++ program. It can be caught and processed by an exception handler.
Exceptions are thrown using the throw keyword followed by an expression. For example: throw MyException(“An error occurred”);
Exceptions are caught using a try block, followed by one or more catch blocks. If an exception is thrown within the try block, the appropriate catch block is executed based on the type of exception.
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