如何在C中包含标头目录

Question

我想知道如何在C程序中包含一个包含几个头的目录，而不是一个一个地包含所有头。

Answer 1

这在C语言中是不可能直接实现的。您必须单独包含标头，或者在makefile中进行某种预处理步骤，以合成包含#include其他标头的标头。

Answer 2

There's no such facility in C. Create a master header file that includes everything that's in that directory, and have your clients include that.

A side-note: it's always better to know what exactly you are #include -ing, ie hand-pick needed header files, instead of doing this thing wholesale to avoid name clashes, unexpected macro expansion, circular dependencies, and what not.

Answer 3

You can write an header that individually includes the other headers and then include this header elsewhere. But an include directive can only include one single header.