For more exciting content, please click the blue text above to follow me! Continuing from the previous article《C Language Textbook: A Summary of Pointer Applications, Sharing the Differences Between Various Applications, and Unraveling the Mysteries of Pointer Usage（1）》 where we shared part of the content, this article continues. The table below summarizes the applications of … Read more
Hello everyone, I am Xiaokang. Today, let’s talk about a severely misunderstood feature of the C language—Variable Length Arrays! Have you heard the saying “You can’t define variable length arrays in C”? If you believed that, you have been seriously misled! Today, we will expose this widely spread “lie” and get to the bottom of … Read more
Hello everyone, I am Xiaokang. Today, let’s talk about a severely misunderstood feature of the C language—Variable Length Arrays! Have you heard the saying, “Variable length arrays cannot be defined in C language”? If you believed that, you have been seriously misled! Let’s uncover this widely spread “lie” and get to the bottom of it! … Read more
Click on the aboveblue text to follow us In embedded systems, memory resources are often very limited, and memory leaks can lead to degraded system performance or even crashes. A memory leak refers to memory allocated by a program that is not properly released, gradually exhausting available memory. As a lightweight real-time operating system (RTOS), … Read more
Today, let’s talk about the various application scenarios of pointers in the C language. Pointers play a crucial role in programming; they are like a “core tool” that helps us manipulate data precisely in the world of memory. As a seasoned technician, I will guide you through the powerful functions of pointers in an easy-to-understand … Read more
Using the malloc Function for Dynamic Memory Allocation in C In C programming, memory management is an important topic, especially when dealing with memory that needs to be dynamically allocated. Dynamic memory allocation allows programs to request a specific amount of memory as needed, without having to declare the size of variables in advance. This … Read more
📌 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
1. What are the methods of memory allocation in C language? ▍Technical Principles Explained In embedded systems, the memory allocation mechanism directly affects the stability and performance of programs. C language manages memory through the following three methods: Memory Allocation Methods Low-Level Mechanism Analysis: 1. Static Storage Area Lifecycle: Allocated at program startup, released at … Read more
Let’s start with the background of newlib. It is an open-source C standard library (libc) that originated from Cygnus and was later maintained by Red Hat. Unlike the “heavyweights” like glibc, newlib is specifically designed for bare-metal and small systems, allowing it to run without an operating system. In simple terms, it provides you with … Read more
Dynamic Memory Allocation in C: malloc and free In C programming, dynamic memory allocation is an important concept. It allows programs to request and release memory as needed during runtime. <span>malloc</span> and <span>free</span> are the two most commonly used functions for dynamic memory management. In this article, we will provide a detailed introduction to the … Read more