Chapter 1: Introduction to Lvalues and Rvalues – Limitations of Surface Understanding In C++ programming, lvalues and rvalues are fundamental and important concepts. Many developers’ understanding of them remains at the level of “the left side of the equals sign is an lvalue, and the right side is an rvalue,” but this perception often leads … Read more
C++ Level 4 Questions Organized by Knowledge Points CCF-GESP C++ Assessment Standards Hong Yang, WeChat Official Account: Hong Yang’s Programming ClassCCF-GESP C++ Assessment StandardsFormal Parameters, Actual Parameters, and Scope Question 1 Question: After running the following program, the value of variable a is ( ). cppRun <span><span><span>int</span></span><span> a </span><span><span>=</span></span><span><span>42</span></span><span><span>;</span></span></span> <span><span><span>int</span></span><span><span>*</span></span><span> p </span><span><span>=</span></span><span><span>&</span></span><span>a</span><span><span>;</span></span></span> <span><span><span>*</span></span><span>p </span><span><span>=</span></span><span><span>*</span></span><span>p </span><span><span>+</span></span><span><span>1</span></span><span><span>;</span></span></span> … Read more
01 Current Situation: The Starting Point of a New Journey I am a student from the 65th session of the Wangdao Training Camp for C++, currently employed at a company in Beijing with a salary of 15K*13, totaling an annual salary of 195K. I graduated from Henan Polytechnic University and, after two unsuccessful attempts at … Read more
Content from Programmer Lao Liao: https://space.bilibili.com/3494351095204205 1.Please explain which memory area each variable in the following code is stored in and why.【Tencent – Backend Development】 #include <iostream>const int g_const = 10; // Constant areaint g_var = 20; // .data sectionstatic int s_var = 30; // .data sectionchar* p_str = "Hello"; // p_str in .data section, … Read more
“Pointers, the heart of programmers.” In the world of C++, pointers are an unavoidable “double-edged sword”—they are the core tool for efficient memory operations and system-level programming, but they also become the easiest pitfall for beginners due to direct memory address manipulation. From dynamic memory allocation to function callbacks, from the underlying implementation of arrays … Read more
The Observer Pattern is a behavioral design pattern that defines a one-to-many dependency between objects. When the state of one object (the Subject) changes, all dependent objects (the Observers) are notified and updated automatically. This pattern is also known as the “publish-subscribe” pattern. Core Roles of the Observer Pattern Subject: The object being observed, which … Read more
C++ Dependency Injection Framework: A Comprehensive Guide to Fruit Dependency injection is an important design pattern that enhances code modularity and testability by separating the creation and binding of objects. In the realm of C++, the Fruit framework developed by Google provides developers with powerful compile-time dependency injection capabilities. What is Fruit? Fruit is a … Read more
Question 1: Adventure Equipment Procurement2025 National Youth Information Literacy Competition C++ Semi-Final Questions for Junior Group OneQuestion 2: Terrain Judgment2025 National Youth Information Literacy Competition C++ Semi-Final Questions for Junior Group TwoQuestion 3: Underground Adventure2025 National Youth Information Literacy Competition C++ Semi-Final Questions for Junior Group ThreeQuestion 4: Count Palindromic Book Titles2025 National Youth Information … Read more
Parents and competitive programming students are encouraged to follow our public account, which focuses on algorithmic thinking training and competitive programming education. This will help parents avoid pitfalls and assist students in effectively improving their competition scores. 💬 1. A “Magical” Discovery: Can C++ Strings Use Triple Quotes? Recently, I encountered a student who said— … Read more
The C++ compilation process is the procedure of converting human-readable source code into a computer-executable binary file. This process can be divided into four core stages: preprocessing, compilation, assembly, and linking. Each stage has specific tasks that collectively ensure the code is correctly transformed into an executable program. 1. Preprocessing Preprocessing is the first stage … Read more