01 Many beginners learning PLC programming think like this: “As long as the functionality is achieved,” “Getting it to run is the most important thing,” “Just pile it up first, and optimize later.” What’s the result? The program can run. But when you need to modify it, you find yourself confused. You can’t even find … Read more
In C language, the Heap and the Stack are the two main memory areas managed during program execution, and they differ fundamentally in management methods, lifecycles, and usage scenarios. Here is an in-depth analysis: 1. Core Differences Comparison Feature Stack Heap Management Method Automatically allocated/released by the compiler (managed during function entry/exit) Manually allocated/released (<span>malloc/calloc/realloc/free</span>) … Read more
A Detailed Explanation of Sequence Points in C Language Author: Luo Guangxuan In the C language, a sequence point is a “time point” in the execution process of a program, with the core rule being: all side effects of expressions (such as variable modifications) must be completely executed before the sequence point; new side effects … Read more
Importance of Variable Names In C++ programming, choosing meaningful variable names is the foundation of good programming practices. Variable names should clearly express the purpose of the variable, making the code more readable and maintainable. C++ Variable Naming Rules 1. Basic Naming Rules #include <iostream> using namespace std; int main() { // ✅ Valid variable … Read more
Overview of Variable Definitions In assembly language, variables are allocated storage space in memory through definition directives. NASM provides various definition directives to declare and initialize variables. Variable Definition Directives Data Initialization Definition Directives Directive Purpose Space Allocated DB Define Byte 1 Byte DW Define Word 2 Bytes DD Define Double Word 4 Bytes DQ … Read more
In the previous articles, we mainly covered pointer algorithms, pointer arrays and array pointers, function pointers, void generic pointers, and linked lists. This article serves as a supplement, adding some common usage patterns and precautions for C pointers. 1. Pointer Swapping: An Efficient Way to Exchange Values By directly manipulating memory addresses through pointers, we … Read more
It’s that time again to decide what to have for lunch. I’m tired of the restaurants around the office, but I still need to eat. So, I decided to write a small program to let Python randomly choose a lunch menu for me. I casually created a source file named <span>random.py</span> (remember this filename!), and … Read more
Today, I would like to share a very practical yet often overlooked feature in C++11— the underlying principles of static_assert. This question is frequently asked in interviews at large companies. This article will systematically analyze the essence of static_assert from four dimensions: syntax evolution, compilation mechanism, practical comparisons, and advanced features, covering key content such … Read more
Variable scope is a very important concept in C++, determining the visibility and lifecycle of variables within a program. Understanding variable scope is crucial for writing correct and efficient C++ programs. 1. Overview of Variable Scope In C++, variable scope refers to the range within which a variable can be accessed in a program. C++ … Read more
Follow+Star Public Account Number, don’t miss out on exciting content Editor | strongerHuang WeChat Public Account | Embedded Column In software projects, code naming is a very important task. Whether to use uppercase ‘A’ or lowercase ‘a’, Chinese or English… Those who have worked on projects should understand this! Today, I will share some common … Read more