Exception handling in C++
Introduction
Are you working with C++ and need help mastering exception handling? You've come to the right place! Dealing with errors, unexpected inputs, or other “exceptions” when programming can be a daunting task. However, exception handling in C++ makes it simpler, allowing your programs to run as efficiently and seamlessly as possible. In this blog post, we'll discuss how to use C++'s tools for exception handling so that you can confidently debug your codebase. Let's get started by taking a closer look at what exceptions are and why they are important for the developer as well as for the user.
What is Exception handling in C++
Exception handling in C++ is a way for the program to anticipate, recognize and handle any errors or complexities that may arise during the execution. Exception handling involves setting up a mechanism that can identify exceptional conditions during execution, allowing the program to respond appropriately and prevent the risk of unexpected application terminations. Exception handling helps developers debug code efficiently by getting key error information which helps decrease development time and increase user satisfaction. Exception handling is an important aspect of programming with C++ as it can detect faults throughout a program's runtime lifecycle, making sure it functions as intended by providing a structured and secure environment in which the program performs its operations.
Advantages of exception handling in C++
There are some advantages of exception handling in C++
- It helps to remove the error handling code from the main life of the code of that particular software
- In the exception handling method, an exception has occurred in a function, that can be handled anywhere in the function calling stack
- Any developer can choose certain ways to handle the exceptions and delegates other to callers' stack
Exception classes in C++
Exception classes are an essential part of Exception Handling in C++, providing a hierarchical structure to categorize and respond to different types of errors. Exception classes make it much easier to solve complex programming issues by allowing developers to identify common problem causes or types so they can quickly implement automated bug fixes. Exception classes in C++ are equipped with detailed information about all aspects of the bug, such as the line number and file name where the error occurred. Furthermore, exception classes also give some valuable insight into how new problems should be tackled when they arise. Exception classes grant developers powerful tools to easily troubleshoot both present and future program issues without having to start from scratch each time. All the exception classes in the c++ programming language are derived from the std::exception class. There are a few others, those are
| Exception | Description |
| std::exception | It is an exception as well as a parent class of all standard exceptions of C++. |
| std::logic_failure | This particular exception can be detected by reading any code. |
| std::runtime_error | This exception cannot be detected by reading any code. |
| std::bad_exception | This exception is used to handle unexpected exceptions in a c++ program. |
| std::bad_cast | This exception is generally thrown by dynamic_cast. |
| std::bad_typeid | This particular exception is generally thrown by typeid. |
| std::bad_alloc | This exception is generally thrown by new. |
Keywords for Exception handling in C++
Try- The try keyword assists to identifies the code block in which certain exceptions could be activated
Catch- This particular program is used as an exception handler to catch any exception. This keyword is added to the section of any program where the developer needs to handle the problem
Throw- When any program finds a problem throw an exception. This keyword helps the program to perform the throw feature.
Syntax
try
{
// the protected code
}
catch( Exception_Name exception1 )
{
// catch block
}
catch( Exception_Name exception2 )
{
// catch block
}
catch( Exception_Name exceptionN )
{
// catch block
}
Example
#include <iostream>
using class std;
float division(int x, int y)
{
if( y == 0 )
{
throw "Attempted to divide by zero!";
}
return (x/y);
}
int main ()
{
int m = 25;
int n = 0;
float p = 0;
try
{
k = division(m, n);
cout << p << endl;
}
catch (const char* e)
{
cerr << e << endl;
}
return 0;
}
Output
Attempted to divide by zero!
Summary
C++ exception handling is a process of responding to the occurrence of exceptions during computation in order to maintain normal program execution. It involves identifying exceptional conditions that may occur during program execution and encoding these conditions in such a way as to enable recovery from them. In many cases, recovering from an exception requires correcting the condition that caused the exception, which often means restarting the entire operation. This article includes try catch c++, c++ throw exception, catch exception in c++, and Try catch throw c++ Exception handling, therefore, providing a flexible mechanism for managing both anticipated and unanticipated errors. Implementing proper exception handling can be difficult, but doing so can result in more robust and reliable software. Do you have any questions about exception handling in C++? Let us know in the comments below!
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