Header Guard 与 #pragma once | C++

本章覆盖：include guard；macro guard；multiple inclusion；`#pragma once`；portability；header dependency；self-contained header；include what you use；不依赖“别的头文件顺便 include 了”。

本章知识点

  • include guard
  • macro guard
  • multiple inclusion
  • #pragma once
  • portability
  • header dependency
  • self-contained header
  • include what you use
  • 不依赖“别的头文件顺便 include 了”