📌 Problem Description Write a function str_replace that replaces the first occurrence of an old substring with a new substring in the given string, returning the modified new string. Requirements: Only a single replacement is required The returned new string must be dynamically allocated Example: Input: str="Hello World", old="World", new="C" Output: "Hello C" Difficulty: ⭐️ … Read more
Understanding the if Statement: A Deep Dive into C Language Control Structures In programming, control flow refers to a series of statements that determine the order of execution of a program. The <span>if</span> statement is one of the most fundamental and commonly used control structures in C language. It allows us to execute different blocks … Read more
Implementation Methods of Thread Synchronization Mechanisms in C Language In multithreaded programming, synchronization between threads is an important issue. When multiple threads access shared resources simultaneously, the absence of appropriate synchronization mechanisms can lead to data inconsistency or program crashes. This article will introduce several common thread synchronization mechanisms in C language, including mutexes, condition … Read more
2. Analysis from the Implementation Perspective (Compiled Code) Previously, we briefly understood the relationship between arrays and pointers from the perspective of program writing. Next, we will analyze this logic more deeply from the perspective of compilation implementation. int *int_pointer = int_array; lea -0x40(%rbp),%rax ; (%rbp) – 0x40 value of int_array mov %rax,-0x8(%rbp) ; -0x8(%rbp) … Read more
Implementation Methods and Examples of Polymorphism in C Language In object-oriented programming, polymorphism is an important concept that allows the same method to be called in different forms through various means. In C language, although there is no direct syntax support for polymorphism, we can achieve similar effects through the following methods: function pointers, combinations … Read more
Introduction to C Language: Understanding Variables and Data Types The C language is a widely used programming language favored by developers for its efficiency and flexibility. For beginners, understanding variables and data types is the first step in learning C. This article will detail these fundamental concepts and provide code examples to help everyone better … Read more
1. What is a Hardware Driver Module In embedded systems, a hardware driver module acts like a bridge, connecting hardware devices on one end and upper-level software on the other, playing a crucial role in the entire system. In simple terms, a hardware driver module is a piece of program code specifically responsible for interacting … Read more
Implementing Peterson’s Algorithm for Mutual Exclusion in C Language After studying the section on process mutual exclusion, I thought I would try to implement it using user-level multithreading in C, which led to this article. Complete Code Peterson’s algorithm combines the single flag method and the double flag method to achieve true mutual exclusion for … Read more
Graphical User Interface: Basics of C Language GUI Programming A graphical user interface (GUI) is the standard interaction method for modern applications, allowing users to interact with programs through images and visual indicators rather than relying solely on text commands. While many developers prefer to use higher-level languages for GUI programming, such as Python or … Read more
Applications and Examples of Signal Handling in C Language Signal handling is an important concept in operating systems and programming, especially in C language, as it allows programs to respond to asynchronous events such as user input, timer expirations, or signals from other external devices. In this article, we will explore the basic principles of … Read more