When examining kernel code, there is a small trick regarding the C language that can be shared to facilitate code reading. 1. Directly Finding the Parent Pointer of a Structure We know that kernel header files define structures, and when defining structures, the first item of important structures is typically set as a sub-structure. As … Read more
Advantages and Applications of C Language in Embedded Systems Introduction The C language is a general-purpose programming language that is widely used in embedded system development due to its efficiency and flexibility. Embedded systems refer to systems that integrate computer technology into other devices to achieve specific functions. This article will detail the advantages of … Read more
The C language is essential foundational knowledge in microcontroller development. This article lists some basic C language knowledge points encountered while learning STM32, hoping to be helpful to everyone. 01 Bit ManipulationNext, we will explain several bit operators and then discuss techniques for using bit manipulation. The C language supports the following six bit operations:Six … Read more
Follow+Star Public Account Number, don’t miss out on exciting content Source | Big Orange Crazy Embedded In software development, every change in requirements generally necessitates rewriting code. After code changes, functional testing is required, and of course, unit testing must be performed before functional testing to avoid unverified scenarios after code modifications, which can lead … Read more
Why write a WeChat public account? During the process of learning C language, I found that most resources online are just selling courses. Some platforms automatically convert you to VIP articles to sell their memberships, and on Douyin, there are videos with the suffix HTML claiming to be Python projects, with comments just dragging on … Read more
Youth Software Programming (C Language) Level Exam Paper (Level 1) Score:100 Number of Questions:5 1. Programming Questions(Total5 questions, each worth20 points, totaling100 points) 1.Input and Output of Numbers Input and Output of Numbers Input an integer and a double-precision floating-point number, first output the floating-point number rounded to2 decimal places, then output the integer. Time … Read more
Selection Sort Algorithm PrincipleThe selection sort algorithm in C language is one of its basic algorithms. The principle of sorting is to traverse through nested loops, marking the index position of the current element and the minimum or maximum (satisfying specific conditions) element in the subsequent elements, and swapping the values at the index positions.This … Read more
📌 Problem Description Please enter an integer x and determine whether it is a palindrome (i.e., it reads the same forwards and backwards). Requirements： Do not use string conversion Handle negative numbers (e.g., -121 is not a palindrome) Advanced: Avoid reversing the entire number to optimize time complexity Example: Input: 121 → Output: is a … Read more
Click 👆👆👆 the blue text Follow “Passion Embedded” <span>#pragma</span> is a preprocessor directive in C/C++ used to pass specific compilation instructions or commands to the compiler. Due to the syntax and functionality of <span>#pragma</span> being highly dependent on the compiler implementation, its behavior may vary significantly across different compilers. 1. Basic Concepts and Syntax Purpose: … Read more
Task: Draw a sine wave, a logarithmic spiral, and an arithmetic spiral.First, draw the mathematical two-dimensional coordinate axes and mark the scales accordingly on the axes.Then, draw a sine wave in red, a logarithmic spiral in green, and an arithmetic spiral in blue.EffectSource Code #define _CRT_SECURE_NO_WARNINGS#include <graphics.h>#include <math.h>#include <stdio.h>#include <conio.h>#define PI 3.1415926535 int main() { … Read more