C++ Special Exercises: Formal Parameters, Actual Parameters, and Scope

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

From Self-Doubt to an Annual Salary of 195K+: C++ Became My Salvation!

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

C++17 Language Features

Language Features if/switch Initialization Statements if (auto it = m.find(key); it != m.end()) { std::cout << "Found: " << it->second; } Inline Variables, Declaration Only in Header Files // In header file class MyClass { static inline int count = 0; // No need for additional definition in .cpp }; Fold Expressions template <typename… Args> … Read more

Happy 8 Trend Tracking Report: E Zone Remains Strong, C Zone Shows Clear Signs of Recovery, V7.0 Model Progresses Steadily

Happy 8 Trend Tracking Report: E Zone Remains Strong, C Zone Shows Clear Signs of Recovery, V7.0 Model Progresses Steadily Stability surpasses aggression, patiently waiting for the trend to clarify—The V7.0 model continues to perform steadily. Dear lottery friends, our V7.0 stability version continues to show robust performance in the latest issue. Let’s review and … Read more

280 Essential Shell Scripts Every Linux Engineer Should Master

A good summary of knowledge can help everyone quickly learn and improve relevant skills.When learning Linux, shell scripting is an indispensable knowledge system. To help everyone quickly get started and enhance their shell programming skills, I have compiled 280 classic shell scripts. It can be said that any qualified Linux engineer has gone through this … Read more

Daily Linux Command: Redirection

Do you need to memorize Linux commands? Daily Linux Command: man In the previous article, we learned about pipes (|), where the concept of redirection was mentioned but not elaborated. In this article, we will delve into this concept in detail. By default, the shell sets the standard input source of a program to the … Read more

Daily Linux: The touch Command – More Than Just File Creation, A Master of Time Management

1. Command Introduction and Principles 1.1 Introduction The touch command is a versatile file management command primarily used to update file timestamps. When the specified file does not exist, the touch command creates a new empty file. Although its functionality seems simple, it plays a wide and important role in various scenarios of scripting and … Read more

Distributed Multi-Channel Wireless Extraction Module

Since the launch of our high-speed wireless extraction module in 2023, this solution has been imitated and adopted by many competitors. Last year, we developed a multi-channel high-speed wireless extraction module (4 channels). Due to its size and power consumption being relatively larger than that of a single channel, it is only suitable for centralized … Read more

The Evolution of SPI Protocol: From Single Lane to Full Interchange

Unveiling the Speed Leap of Communication Interfaces in Embedded Development Chapter 1: Country Road – Standard SPI Imagine a quiet two-way single-lane country road. This is Standard SPI, which forms the foundation of all advanced modes. It primarily relies on four lines for communication: • SCLK (Clock Line): Like a metronome, generated by the master … Read more

Analysis and Solutions for Data Fluctuations in Weighing Instruments and Computer Data Transmission

In industrial production, logistics warehousing, laboratory testing, and other scenarios, the real-time data transmission between weighing instruments and computers is a key step in achieving automated recording, analysis, and management of weight data. However, in practical applications, data fluctuations often occur—where the transmitted weight values fluctuate frequently and irregularly, failing to accurately reflect the true … Read more