Today, we will explore an important concept that plays the role of a judge in programming—relational expressions. 1. Explanation of Knowledge Points 1. What is a Relational Expression? In C language, a relational expression is an expression used to compare the relationship between two values. It consists of two operands (which can be variables, constants, … Read more
Introduction: From Troubleshooting to Skill Transfer I still remember fifteen years ago when I first independently dealt with a PLC fault in an injection molding machine. It was three in the morning, the production line was down, and the manager called anxiously: “Lao Wang, hurry up! The whole line is stopped!” Standing in front of … Read more
Implementing a Simple Encryption and Decryption Tool in C In today’s article, we will implement a simple encryption and decryption tool using the C programming language. This tool is based on a very basic character substitution algorithm, allowing users to input a plaintext, encrypt it using a defined method, and then decrypt it back through … Read more
Many students have such concerns::“Teacher, my English is not good, will I be unable to learn microcontrollers?Will it be difficult to learn programming because my English is poor?” I have been teaching microcontrollers for many years, and every year students ask this question. Today, I will talk about this matter, the relationship between microcontroller programming … Read more
Python Control Structures: Techniques for Implementing Complex Business Logic Python is a powerful and easy-to-learn programming language, and control structures are an important component of programming that allow you to determine the execution path of your code based on conditions and loops. Mastering control structures in Python is crucial for clearly expressing complex business logic. … Read more
Learning programming involves not only knowing that there are errors in the program and how to correct them, but also understanding where the errors are and why the computer produces such erroneous outputs. The behavior of computers is always explainable; one must understand the underlying execution logic rather than simply correcting the program. This is … Read more