What is multi-threaded programming in C++?

In C++, multi-threaded programming refers to using multiple threads to simultaneously execute different tasks or operations in order to improve the performance and efficiency of a program. By utilizing multi-threaded programming, a program can run in parallel on multiple CPU cores, thereby speeding up processing. C++ provides support for multi-threaded programming through standard library features such as std::thread, std::mutex, std::condition_variable, etc. It is important to pay attention to thread safety and synchronization mechanisms in multi-threaded programming in order to avoid race conditions and data access conflicts.