How to remove unhandled exceptions in C++?

Question

Aryan Kumar · Answer

There are two ways to remove unhandled exceptions in C++:

Using try and catch blocks: This is the most common way to handle exceptions. The try block contains the code that might throw an exception, and the catch block catches the exception and handles it.
Using the noexcept keyword: The noexcept keyword can be used to mark a function as not throwing an exception. If an exception is thrown from a noexcept function, the program will terminate.

Here is an example of how to use try and catch blocks to handle exceptions:

C++

void foo() {
  try {
    // Code that might throw an exception
  } catch (const std::exception& e) {
    // Handle the exception
    std::cout << "Exception: " << e.what() << std::endl;
  }
}

Here is an example of how to use the noexcept keyword to prevent exceptions:

C++

[[noexcept]] void foo() {
  // Code that cannot throw an exception
}

If you are not sure whether a function can throw an exception, it is always best to use try and catch blocks to handle them. This will help to prevent your program from crashing if an exception is thrown.

Here are some additional things to keep in mind when handling exceptions in C++:

The catch block must catch the specific type of exception that is thrown. If it does not, the program will terminate.
You can use multiple catch blocks to catch different types of exceptions.
The finally block is executed regardless of whether an exception is thrown. It is often used to clean up resources.

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How to remove unhandled exceptions in C++?

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