C++

4.2K+ posts

Last Updated: 23 July 2025

A Double-Ended Queue (Deque) is an abstract data structure that generalizes a queue, for which elements can be added to or removed from either the front (head) or back (ta...read more

C++

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CPP-DSA

How to Provide a Swap Function for My Class in C++?

Last Updated: 23 July 2025

In C++, providing a swap function for the class allows efficient swapping of the objects of that class type which can be important for many algorithms like sorting algorit...read more

Why Doesn't std::queue::pop Return Value?

Last Updated: 23 July 2025

In C++, we use std::queue which is a container adapter in the standard template library (STL) and is used for managing a collection of elements in a FIFO (first-in, first-...read more

How to Specify a Pointer to an Overloaded Function?

Last Updated: 23 July 2025

In C++, function overloading allows multiple functions to have the same name but different parameter lists. While overloading is a powerful feature, it can lead to ambigui...read more

C++

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STL

How to Convert wstring to string in C++?

Last Updated: 23 July 2025

std::wstring in C++, is a wide string type where each character is a wide character, typically used for internationalization. Sometimes, we need to convert a std::wstring ...read more

How to Sort using Member Function as Comparator in C++?

Last Updated: 23 July 2025

In C++, sorting is a common operation that can be customized by providing a comparator function. When working with classes, we might need to sort objects based on their me...read more

How to Sort a Vector of Pairs Based on the Second Element of the Pair in C++?

Last Updated: 23 July 2025

In C++, a vector of pairs is a common data structure used to store pairs of values. Sometimes, when dealing with pairs we need to sort such vectors of pairs based on a spe...read more

Why Can I Not push_back a unique_ptr into a Vector?

Last Updated: 23 July 2025

In C++, the STL provides us with the containers and smart pointers that help us manage dynamic memory efficiently. However, we might encounter difficulties when trying to ...read more

Alternative to vector<bool>

Last Updated: 23 July 2025

In C++, std::vector is a container in STL that we use commonly. However, std::vectorbool has a specialized implementation that can lead to several issues, including perfor...read more

How to Get Vector Pointer to Raw Data in C++?

Last Updated: 23 July 2025

In C++, vector is a dynamic array that stores the data in the contiguous memory allocated during runtime. It internally keeps the pointer to this raw data memory. In this ...read more

Error: std::endl is of Unknown Type when Overloading Operator <<

Last Updated: 22 July 2024

In C++, the operator is commonly overloaded for custom output for user-defined types using streams. However, an issue may arise when using std::endl with an overloaded op...read more

C++

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cpp-input-output

cpp-operator-overloading

cpp-manipulators

Why can't simple initialize (with braces) 2D std::array?

Last Updated: 23 July 2025

C++ provides a fixed-size sequence container named std::array. It is a useful alternative to C-style arrays, providing additional features such as bounds checking and iter...read more

Floating Point Values as Keys in std:map

Last Updated: 23 July 2025

The std::map in C++ is a sorted associative container that stores key-value pairs, where each key is unique. When working with std::map, keys are typically of a type that ...read more

UTF-8 to Wide Char Conversion in C++ STL

Last Updated: 23 July 2025

UTF - 8 is a variable-length encoding that represents Unicode characters using 1 to 4 bytes. It’s widely used for text storage and transmission due to its compactness and ...read more

Red Black Tree (RB-Tree) Using C++

Last Updated: 23 July 2025

A Red Black Tree is a self-balancing binary search tree where each node has an extra bit for denoting the color of the node, either red or black. This color coding is used...read more

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