What is exception handling in C++ ?

webmaster — Fri, 19 Aug 2022 12:27:33 +0000

In C++ exception handling is a process to handle runtime errors.
If we perform exception handling, so the normal flow of the application can be maintained even after runtime errors.
At run time exception is an event or object which is thrown in C++ and all exceptions are derived from std::exception class.
It prints exception message and terminates the program, if we don’t handle the exception.
In C++ exception handling consists of three keywords, they are try, throw, catch
In exception handling try keyword allows you to define a block of code to be tested for errors when it is being executed.
In exception handling throw keyword throws an exception when a problem is detected, which lets us create a custom error.
In exception handling catch keyword allows you to define a block of code to be executed, if an error occurs in the try block.

Syntax

             try {
  // Block of code to try
  throw exception; // Throw an exception when a problem arise
}
catch () {
  // Block of code to handle errors
}

Sample Code

try {
  int age = 15;
  if (age >= 18) {
    cout << "Access granted - you are old enough.";
  } else {
    throw (age);
  }
}
catch (int myNum) {
  cout << "Access denied - You must be at least 18 years old.\n";
  cout << "Age is: " << myNum;
}

what do you mean by exception handling in c++ - Wikitechy

What is exception handling in C++ ?

Syntax

Sample Code

Output