In C++ programming, if you want to efficiently store data relationships like “Name – Score” or “ID – Information”, the map is definitely the preferred tool. It comes with a key-value pair structure, automatically sorts and deduplicates, and offers high efficiency for searching and modifying. Whether for daily practice or competitive programming, it is frequently … Read more
1. Course Introduction In the last class, we learned about variables, data types, user input, and conditional statements in Python, enabling us to write simple BMI calculators and grade evaluation programs. However, when faced with operations that need to be repeated, such as calculating the sum from 1 to 100, we would have to write … Read more
What is BusyBox? BusyBox is a single executable file that integrates over 400 commonly used Unix commands, known as “the Swiss Army Knife of Embedded Linux”. It compresses the complete Linux toolset into a very small size of only 1-5MB. Core Advantages • Extremely Small Size: The base image is only 1-5MB • Feature-Rich: 400+ … Read more
@[TOC](Comprehensive Explanation of the C++ Standard Template Library (STL) – Everything You Need to Learn About STL) 1. Concept of STL 1. STL (Standard Template Library) is a generic term for the “containers + algorithms + iterators” in the C++ standard library, implemented using templates for generic programming. It evolved from HP’s STL and was … Read more
Container technology and virtualization technology (commonly referring to virtual machine technology) play a core role in cloud computing and system architecture, but there are essential differences between the two in terms of architecture, performance, isolation, and application scenarios. The following analyzes their differences from five dimensions:1. Technological Architecture Innovation: Lightweight and Efficiency Revolution1. Shared Kernel … Read more
Boost.Bimap: A Bidirectional Mapping Library in C++ In C++ programming, Boost.Bimap is a very useful library that provides a container for bidirectional mapping. Unlike the standard std::map, Boost.Bimap allows data to be accessed from both directions, meaning you can use data from either side as a key to look up data on the other side. … Read more
Recently, during my technical exploration, I noticed that the Kylin system has released version V11. As a long-time user of the V10 series, I became very interested in this major version update and decided to personally install and experience it. Brief Introduction: The Kylin operating system (Kylin OS) is an operating system independently developed in … Read more
1. Basic Type Arrays and Caching Arrays are a contiguous block of memory, making them ideal for caching as they provide fast sequential access and allow O(1) time complexity random access when the index is known. Code Example:<span>int</span>, <span>char</span>, <span>byte</span> (i.e., <span>quint8</span>) arrays #include <QDebug> #include <QtGlobal> // For quint8 void basicArrayExamples() { // 1. … Read more
2 C++ Standard Library 2.1 Overview of the C++ Standard Library The above image outlines some components of the C++ Standard Library (SL), including algorithms, iterators, atomic operations, ranges, coroutines, input/output, thread support, and containers. It is important to note that most components are provided by the C++17 standard, with two provided by the C++20 … Read more
In the C++ Standard Template Library (STL), associative containers are a very important class of containers that provide a key-value pair storage method. This article will detail three commonly used associative containers: <span>set</span>, <span>map</span>, and <span>multiset</span>, and demonstrate their efficient operations through code examples. 1. set 1.1 Overview <span>set</span> is a collection that only allows … Read more