Click the blue text to follow! Just arrived at the workshop this morning, and the equipment suddenly alarmed and stopped. Checking the fault information: Timer overflow. Our colleague Xiao Zhang scratched his head: “Isn’t it just a timer? Why does it keep having problems?” Many beginners in industrial control encounter similar situations. Today, I will … Read more
Recently, I have been frequently asked by newcomers about I/O mapping, which is quite annoying. After working in this field for over ten years, I have seen too many people who can’t even understand such basic concepts, constantly complicating simple issues. So today, I will discuss I/O mapping in PLCs, so please stop asking about … Read more
Recently, I’ve encountered several newcomers asking about the PLC scan cycle issues, it’s really frustrating! They keep making the same mistakes over and over again. After working in this field for over ten years, I’ve seen too many program crashes caused by a lack of understanding of the scan cycle principles. To put it bluntly, … Read more
After years in automation, I find it unbearable to deal with newcomers who can’t even grasp the basics of sequential control. Just the other day, I encountered a novice in electrical engineering whose Siemens sequential control program was a complete mess, and after running it for a long time, nothing was accomplished, which made me … Read more
Introduction Continuing from the previous article, where we attempted to write a Hello World program in Prolog, we learned about the basic structure and execution of Prolog programs. In this article, we will build a simple HTTP server based on <span>hello_world.pl</span>. Starting the HTTP Server Using the built-in library of SWI-Prolog, it is easy to … Read more
▲ Click the blue text above to follow us and never miss any valuable articles! Senior engineers will guide you through the basics of Embedded Rust! Main Content: 1. Basic knowledge of Rust: origins, ecosystem, advantages, syntax, and development environment setup. 2. Analysis of three practical tasks, which include: Using bubble sort to process an … Read more
Hello everyone! Today, I will guide you through implementing commonly used date handling functions in C++. 1. Basic Knowledge of Excel Date Functions The commonly used date functions in Excel can be categorized into three types: Extraction Functions: YEAR, MONTH, DAY, etc. Calculation Functions: DATEDIF, EDATE, etc. Conversion Functions: DATEVALUE, TEXT, etc. To implement these … Read more
Today is the 704th day of learning programming with the cool rain! Hello, everyone! This is the problem from the GESP Level 3 Examination. Day 704 GESP Level 3 Examination in March 2025 Problem 2: Word Frequency Count Problem Description In text processing, counting the frequency of words is a common task. Now, given n … Read more
For competition inquiries, please scan the QR code to join the group For an introduction by Teacher Shen, please see:Nanjing Normal University Master Teacher, Xin’ao Coach enters the classroom, students achieve brilliance in competitions1. Do not treat programming as a means to advance in education; otherwise, it will not lead far, and the child will … Read more
Today, we will explore a cool and practical technology—using C++ Lambda expressions to handle various conditional judgments in Excel. Lambda acts like a small function wizard that can be created anytime and anywhere, making your Excel data processing code super flexible and powerful! 1. Review of Lambda Expression Basics Lambda expressions are anonymous function objects … Read more