Generic Pointers in C: Characteristics and Applications of Void Pointers In C, pointers are a powerful tool that can effectively manipulate memory, control hardware, and implement data structures. One special type of pointer, the <span>void</span> pointer (also known as a generic pointer), plays an important role in programming. This article will detail the characteristics and … Read more
Pointers and Pointers to Pointers in C: Using Multilevel Pointers In C, pointers are a very important concept. They can be used not only to directly manipulate memory but also to implement complex data structures and algorithms. In this article, we will delve into the use of pointers and multilevel pointers (i.e., “pointers to pointers”). … Read more
In modern computing, multithreaded programming is a common technique that allows programs to execute multiple tasks simultaneously, thereby improving efficiency and responsiveness. The C language provides robust multithreading support through the POSIX threads (pthread) library. This article will detail how to create and manage threads in C, as well as how to synchronize them. 1. … Read more
String Handling in C: Common Functions and String Manipulation Techniques In C, strings are stored as arrays of characters, terminated by a null character (‘\0’). Although C does not have a built-in string type, we can manipulate strings using a series of functions from the standard library. This article will introduce some common string handling … Read more
Sorting Algorithms in C: Implementations of Bubble, Selection, and Insertion Sort In computer science, sorting algorithms are a crucial part. They are used to arrange data in a specific order. This article will introduce three basic sorting algorithms: Bubble Sort, Selection Sort, and Insertion Sort, along with their corresponding implementations in C. 1. Bubble Sort … Read more
I am Lao Wen, an embedded engineer who loves learning.Follow me to become even better together! 1 – Principles Low coupling means that modules should exist as independently as possible. While some connection between modules is inevitable, the interfaces between them should be minimal and simple. Thus, high cohesion from the internal characteristics of each … Read more
Hello everyone, welcome to <span>LiXin Embedded</span>. In embedded development, structures are an indispensable tool. Compared to classes in object-oriented programming, C language structures are more like pure data collections without methods, making them simple and efficient. For embedded engineers, it is essential to not only use structures conveniently but also to understand their layout in … Read more
In the C language, <span>extern</span>, <span>volatile</span>, and <span>inline</span> are three widely used keywords, each related to cross-file variable declarations, compiler optimization control, and function inlining. Mastering their usage can effectively enhance code structure, stability, and performance. 1. extern (External Variable Declaration) <span>extern</span> is used to declare global variables or functions defined in other files, enabling … Read more
1. Problem: How many distinct three-digit numbers can be formed using the digits 1, 2, 3, and 4 without repetition? What are they? Program Analysis: The digits that can fill the hundreds, tens, and units places are 1, 2, 3, and 4. Generate all permutations and then remove those that do not meet the criteria. … Read more
5.Why Create the Array Data Structure From the previous analysis, we can understand that the essence of an array name is a pointer. Since we already have the pointer data type, why create the array data type? Isn’t that redundant? Can we program normally without creating arrays? The answer is: Yes, it is indeed possible … Read more