Category Archive for "C++ Faq"

Understanding Sequence Points and Their Relationship with Undefined Behavior

When writing code in C++, it's important to have a clear understanding of sequence points and their relationship with undefined behavior. Sequence points are specific...

What is the copy-and-swap idiom?

In C++, the copy-and-swap idiom is a technique used to help implement correct and efficient copy assignment operation for a class. It involves creating a copy constructor and a swa...

What are copy elision and return value optimization?

Copy elision and return value optimization are two concepts related to optimizing code in C++. They both involve the optimization of object copying in certain situations, resulting...

Understanding the Differences between Pointer and Reference Variables in C++

When working with C++, it is important to understand the differences between pointer variables and reference variables. While both serve similar purposes, they have distinct charac...

Why isn't sizeof for a struct equal to the sum of sizeof of each member?

When working with structs in C or C++, you may have come across a situation where the size of a struct is larger than the sum of the sizes of its individual members. This can be qu...

How to use arrays in C++?

C++ inherited arrays from C where they are used virtually everywhere. C++ provides abstractions that are easier to use and less error-prone...

Iterator Invalidation Rules for C++ Containers

C++ containers, such as vectors, lists, and maps, provide a way to store and manage collections of elements. When working with containers, it is common to use iterato...

What is Move Semantics in C++?

In the world of C++, move semantics is a powerful feature introduced in C++11 that allows for more efficient memory handling and resource management. It aims to eliminate unnecessa...

Understanding the Difference between a Definition and a Declaration in Programming

When it comes to programming, particularly in languages like C++ and C, the terms "definition" and "declaration" are often used interchangeably, despite having distinct meanings. U...

What is a smart pointer and when should I use one?

Pointers are an essential concept in C++ programming, allowing developers to manipulate memory and access objects dynamically. However, raw pointers can often lead to...