C++11 is a milestone version in the development of the C++ language, also known as the beginning of modern C++. Compared to C++98, it introduces a large number of revolutionary features that fundamentally change the programming style of C++. 1. Core Basic Features of C++98 (1998) C++98 established the basic framework of C++, laying the … Read more
Avoid pitfalls of wild pointers and memory leaks, and understand the core foundation of embedded development from a kernel perspective. In embedded system development, the C language has always held an unshakable position. Pointers and memory management, as the most powerful yet dangerous features of C, often serve as a crucial benchmark distinguishing novice engineers … Read more
Introduction“Do you understand the interrupt mechanism of Cortex-M?”“How do you implement a memory pool in C?”“How is volatile used in embedded systems?” If you are asked these questions in an interview and cannot answer, you may be eliminated immediately!Embedded development is different from regular software development; interviewers focus heavily on low-level skills.. Today, we reveal … Read more
We typically divide the basic syntax of the C language into several parts: data types, operators, control statements, functions, arrays, pointers, structures, input and output, etc. Below is an overview of these basic syntaxes. 1. Data Types: Basic types: integer types (int, short, long, char), floating-point types (float, double) Enumeration type (enum) void type Derived … Read more
The embedded development framework serves as a bridge connecting hardware abstraction and business logic, making it more important to grasp its design principles than to memorize specific APIs. Embedded Development Framework System Layered Architecture Design Embedded systems adopt a layered architecture design, with each layer having clear responsibility boundaries: Application Layer Middleware Layer OS Layer … Read more
Unveiling the Mysteries of Pointers In the fascinating world of C language, pointers are undoubtedly the most dazzling yet elusive star. They act like a magical key; mastering them allows one to unlock the treasure trove of C language’s powerful features, delving into the mysterious realms of operating systems, hardware drivers, and low-level development. However, … Read more
What seems like a simple constructor hides countless dangers; how many can you avoid? Recently, I came across a C++ constructor problem during a code review. It appears unremarkable but has caused many programmers to falter. Today, let’s uncover the 3 fatal traps of this “death constructor”! Original code: Under the calm surface, dark currents … Read more
The core goal of high-quality C++ programming is to write maintainable, scalable, efficient, and safe code. Below are practical high-quality programming guidelines covering key dimensions such as coding standards, design principles, performance optimization, and security practices: 1. Coding Standards and Style 1. Naming Conventions Variables/Functions: Use <span>snake_case</span> (e.g., <span>user_name</span>, <span>calculate_sum</span>), avoid abbreviations (unless they are … Read more
C++ Level 4 Questions Organized by Knowledge Points C++ Pointer Types: Concepts and Basic Applications Question 1 Question: Which of the following descriptions about arrays is ( ) incorrect. Options: A. The array name is a pointer constant B. Random access to array elements is convenient and fast C. Arrays can be incremented like pointers … Read more
Content from Programmer Lao Liao: https://space.bilibili.com/3494351095204205 1.Please explain which memory area each variable in the following code is stored in and why.【Tencent – Backend Development】 #include <iostream>const int g_const = 10; // Constant areaint g_var = 20; // .data sectionstatic int s_var = 30; // .data sectionchar* p_str = "Hello"; // p_str in .data section, … Read more