C++ Exceptions and Handling

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the purpose of the `catch` block in a `try-catch` statement?

The purpose of the catch block is to execute one or more statements if an exception is thrown within the try block.

What is the difference between throwing an exception using `throw;` and `throw "Division by zero condition!";`?

Throwing throw; will re-throw the current exception, while throw "Division by zero condition!"; will throw a new exception with the string value "Division by zero condition!" as the exception.

Explain the purpose of the `try` block in a `try-catch` statement.

The try block contains the program statements that might cause an exception to be generated or 'thrown' by the program.

What is the purpose of the `throw` statement in a `try-catch` statement?

The <code>throw</code> statement is used to throw an exception, which can be of any type, within the <code>try</code> block. Signup and view all the answers

How can you prevent a `Divide By Zero Exception` in a division operation with integer or decimal values?

To prevent the <code>Divide By Zero Exception</code>, ensure that the denominator in a division operation with integer or decimal values is non-zero. Signup and view all the answers

What is the purpose of the `vector` class in programming?

The <code>vector</code> class is a template class of sequence containers that are capable of storing multiple elements of any defined data type in a contiguous block of memory, unlike raw arrays. Signup and view all the answers

What is an exception in the context of C++ programming?

An exception is an unwanted program state or a problem that arises during the execution of a program, such as an attempt to divide by zero. Signup and view all the answers

What is the purpose of exception handling in C++?

Exception handling provides a way to transfer control from one part of a program to another, and is commonly used to handle error situations. Signup and view all the answers

Describe the process of exception handling in C++.

In C++, exception handling proceeds by: 1) Some library software or your code signals that something unusual has happened (throwing an exception). 2) At some other place in your program, you place the code that deals with the exceptional case (handling the exception). Signup and view all the answers

What is the purpose of a try-catch statement block in C++?

A try-catch statement block is used to "trap" program exceptions, allowing you to handle exceptional cases. Signup and view all the answers

Can a single try block have multiple catch statements in C++? If so, why?

Yes, you can list down multiple catch statements to catch different types of exceptions in case your try block raises more than one exception in different situations. Signup and view all the answers

What is a good programming practice when dealing with exceptions, as suggested by the text?

It is often easier to write a program by first assuming that nothing incorrect will happen. Once it works correctly for the expected cases, add code to handle the exceptional cases. Signup and view all the answers

Study Notes

Exception Handling

An exception is an unwanted program state that arises during execution, such as dividing by zero.
Exceptions provide a way to transfer control from one part of a program to another.
Exception handling is used to handle error situations, making it easier to write a program by assuming nothing incorrect will happen initially.

Throwing and Catching Exceptions

An exception is thrown using a throw statement, which can be used to throw a value of any type.
The try-catch statement block is used to "trap" program exceptions, with the try block containing statements that might cause an exception.
The catch block follows the try block, executing one or more statements if an exception is thrown.
A throw statement is used to throw an exception, such as throw "Division by zero condition!";.

Divide By Zero Exception

Trying to divide an integer or Decimal number by zero throws a Divide By Zero Exception exception.
To prevent this exception, ensure the denominator in a division operation with integer or Decimal values is non-zero.

Vectors

Vectors are template classes of sequence containers that can store multiple elements of any defined data type.
They store elements in a contiguous block of memory.
Vectors are access-safe as long as built-in access methods are used.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Learn about C++ exceptions and how they are used to handle exceptional circumstances during program execution. Explore how exceptions help in transferring control from one part of a program to another, with examples like handling errors during data copying.