什么是头文件和库之间的区别？ [英] What's the difference between a header file and a library?

问题描述

一个我有一个很难理解的事情是编译器是如何工作的。我有很多与它的困难，但特别是我不断收到标题和混了库。如果有人能搞清楚一点，那简直太好了。

One of the things I'm having a hard time understanding is how the compiler works. I'm having a lot of difficulties with it, but in particular I keep getting headers and libraries mixed up. If somebody could clear things up a bit, that'd be great.

推荐答案

想想都像这样（免责声明：这是一个非常高层次的比喻;）。

Think of both like this (Disclaimer: this is a really high-level analogy ;) ..

• 在标题是您可以拨打一个电话号码，而...


• ...在库是实际的人，你可以到达那里！

• The header is a phone number you can call, while...
• ...the library is the actual person you can reach there!

它的接口和执行的根本区别;在接口的（头）告诉你如何以调用一些功能（不知道它是如何工作的），而实施的（库）是实际功能。

It's the fundamental difference between "interface" and "implementation"; the interface (header) tells you how to call some functionality (without knowing how it works), while the implementation (library) is the actual functionality.

请注意：这个概念是如此的根本，因为它可以让你的灵活性：你可以有不同的库相同的标题（即功能正是所谓以同样的方式），以及每个磁带库可以的实施以不同的方式的功能。通过保持相同的接口，可以更换库不改变的您的code。

Note: The concept is so fundamental, because it allows you flexibility: you can have the same header for different libraries (i.e. the functionality is exactly called in the same way), and each library may implement the functionality in a different way. By keeping the same interface, you can replace the libraries without changing your code.

和：你可以改变库的实现而不会破坏调用code

And: you can change the implementation of the library without breaking the calling code!

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