这是懒惰的编码。使用头文件。是的，他们可以增加编译时间，但他们的意思是，你可以很容易地重新实现你的code大块，或更好，但可能随时另一家开发商。头文件作为你的什么C / C ++ code会做一个模板。这是一个坏主意，放弃或忽略它。

It's lazy coding. Use header files. Yes they can increase compile time but they mean that you can easily re-implement chunks of your code, or better yet, another developer could at anytime. The header file serves as a template for what your C/C++ code is going to do. It's a bad idea to discard or ignore it.