Async Programming

Differences Between char*, Character Arrays, and Dynamically Allocated Strings in C Programming

by
Differences Between char*, Character Arrays, and Dynamically Allocated Strings in C Programming

This is a very critical and often confused knowledge point in C language: <span>char*</span>, character arrays (such as <span>char str[]</span>), and the relationship between strings. Let’s thoroughly clarify their essence, differences, and connections. 1. Basic Concepts of the Three Term Meaning <span>char*</span> Character pointer, pointing to the address of one (or more) <span>char</span> type variables … Read more

Reverse Engineering of a Parameterless C Function with Return Value in 32-bit

by
Reverse Engineering of a Parameterless C Function with Return Value in 32-bit

Reverse Engineering of a Parameterless C Function with Return Value in 32-bit Below is a simple example of a C function that does not take any parameters but returns an integer value. Additionally, I provide step-by-step instructions for writing and viewing its assembly code using Visual Studio 2022. C Function #include <stdio.h> // Definition of … Read more

A Comprehensive Guide to Bit Manipulation in C

by
A Comprehensive Guide to Bit Manipulation in C

A Complete Guide to Bit Manipulation in C 1. Basic Concepts of Bit Manipulation Bit manipulation is a technique that directly operates on the binary bits of integers in memory. The C language provides six bitwise operators: 1. Bitwise AND (&): The result is 1 when both corresponding bits of the operands are 1. 2. … Read more

Fundamentals of Dynamic Memory Allocation in C Programming and Its Use Cases

by
Fundamentals of Dynamic Memory Allocation in C Programming and Its Use Cases

Dynamic memory allocation in C refers to the process where the program requests memory from the system at runtime, based on its needs, rather than determining the memory size during the compilation phase. This is key to building flexible and scalable programs. Below, I will comprehensively explain the fundamentals of dynamic memory allocation through concepts, … Read more

1-on-1 C Programming Course

by
1-on-1 C Programming Course

01 Course Introduction The C language is a general-purpose computer programming language that is widely used. The design goal of C is to provide a programming language that can be easily compiled, handle low-level memory, generate minimal machine code, and run without any runtime environment support. A C program written to standard specifications can be … Read more

Usage of void and void* Pointers in C Programming

by
Usage of void and void* Pointers in C Programming

<span>void</span> and <span>void*</span> are fundamental yet very useful types in C programming, especially when dealing with generic pointers (such as <span>malloc</span>, callback functions, etc.), where <span>void*</span> is crucial. 1. What are <span>void</span> and <span>void*</span> Syntax Meaning <span>void</span> Indicates “no type” or “no return value”, commonly used for function return types <span>void*</span> Generic pointer type, can … Read more

Understanding C Language Two-Dimensional Arrays: A Comprehensive Analysis from Definition to Practical Application

by
Understanding C Language Two-Dimensional Arrays: A Comprehensive Analysis from Definition to Practical Application

Understanding C Language Two-Dimensional Arrays: A Comprehensive Analysis from Definition to Practical Application In the world of C programming, data structures are the foundation for building software applications. In addition to the common one-dimensional arrays, two-dimensional arrays serve as a powerful data organization form, playing a crucial role in handling complex data such as matrices … Read more

C Language Basics: The While Loop

by
C Language Basics: The While Loop

Today, we will explore a very basic yet extremely powerful “magic spell” in C language – the <span>while</span> statement. It allows your program to repeatedly execute certain tasks, greatly improving efficiency, making it a “time machine” in the programming world! 1. What is the <span>while</span> statement? Imagine you are playing a game where you need … Read more

How Embedded Experts Optimize Microcontroller Programs from a Global Perspective

by
How Embedded Experts Optimize Microcontroller Programs from a Global Perspective

I am Lao Wen, an embedded engineer who loves learning.Follow me to become even better together!Program Structure Optimization 1. Program Writing Structure Although the writing format does not affect the quality of the generated code, certain writing rules should still be followed during actual programming. A clearly written program is beneficial for future maintenance. When … Read more

Pattern Matching Algorithm in C: KMP Algorithm

by
Pattern Matching Algorithm in C: KMP Algorithm

In computer science, string matching is an important area of research. We often need to find the position of a pattern string within a text string. While there are various methods to achieve this, today we will focus on an efficient algorithm—the KMP (Knuth-Morris-Pratt) algorithm. Introduction to KMP Algorithm The KMP algorithm was proposed by … Read more