Handling files and paths is a frequent task in any programming language. In C++, we used to rely on platform-specific APIs (such as CreateFile on Windows or open in POSIX) to accomplish this. This approach was not only cumbersome but also required consideration of cross-platform compatibility issues. The good news is that with the introduction … Read more
Hi, friends! I’m Hui Mei! 😊 Today we are going to talk about a very useful tool in C++ — **std::async and std::future**, which make asynchronous programming simple and efficient. If you’ve ever struggled with issues like locks and callback functions in multithreaded programming, today’s content will surely open up a new world for you! … Read more
Hello everyone! Today we’re going to talk about std::future and std::promise in C++. With the rise of multi-core processors, asynchronous programming has become an important skill for developers to master. The std::future and std::promise introduced in the C++11 standard are great partners for handling asynchronous tasks, allowing us to complete asynchronous operations more elegantly. In … Read more
In C++, we often hear the term “exception safety”. It is not only about whether the program runs stably but also closely related to performance. The protagonist we are discussing today, noexcept, is a keyword closely related to exceptions. It can help us optimize program performance, but improper use may also create “hidden traps”. Today, … Read more
In C++, forgetting to release dynamically allocated memory is a common pitfall for beginners. To address this issue, smart pointers have emerged. The smart pointer std::shared_ptr allows multiple pointers to share the same memory and manages its lifecycle through reference counting, which is very convenient. However, std::shared_ptr is not infallible; it has a fatal flaw: … Read more
When writing C++ programs, we sometimes need to verify whether certain conditions are met, such as whether the array size is acceptable or whether template parameters are valid. If these issues are discovered at runtime, they can cause the program to crash unexpectedly. Static assertions (static_assert) are a compile-time tool provided by C++, which can … Read more
C++ memory management is a core topic in programming, involving complex concepts such as pointers, dynamic memory allocation, memory leaks, and memory fragmentation. C++ provides the ability to manipulate memory directly, which brings flexibility but also comes with higher complexity and the risk of errors. To aid in understanding C++ memory management, we will explore … Read more
Hi, friends! Today we are going to talk about a very important tool in C++—Smart Pointers. If you have previously written dynamic memory management code in C++, you may be familiar with new and delete. But have you ever fallen into the pit of memory leaks because you forgot to call delete? Or crashed your … Read more
Imagine you are ordering a cup of milk tea 🧋… “Boss, I want a cup of pearl milk tea!” “Do you want to adjust the sweetness and ice level?” “No, the default is fine!” This scene seems very familiar, right? In the programming world, C++ default parameters are like the “standard configuration” at a milk … Read more
1. The Emergence of the C++20 Module System 1. The Emergence of the C++20 Module System In the world of C++ programming, the traditional header file mechanism has long been a double-edged sword. On one hand, it provides some convenience for code organization and reuse; on the other hand, it brings many tricky problems that … Read more