C++ 如何在其他src文件夹中包含头文件
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how to include header files in other src folder
提问by Richard
I have a c++ project having two src folders. Source file in folder 1 may need to include header file in src folder 2. Is it possible? or how should I write my Makefiles? thanks
我有一个包含两个 src 文件夹的 C++ 项目。文件夹 1 中的源文件可能需要在 src 文件夹 2 中包含头文件。这可能吗？或者我应该如何编写我的 Makefile？谢谢
回答by Mike Caron
Depending on how closely the two folders are related (eg, if they're the same project), then it can be as easy as:
根据两个文件夹的关联程度（例如，如果它们是同一个项目），那么它可以很简单：
#include "../otherfolder/header.h"
If they're separate projects, then it's customary to simply add the other project's header directory to your project's header search path, and include the header like this:
如果它们是单独的项目，那么通常只需将另一个项目的头目录添加到您项目的头搜索路径中，并像这样包含头：
#include <header.h>
(In practice, the brackets/quotes don't matter, but it helps keep external vs. internal header imports separate)
（实际上，括号/引号无关紧要，但它有助于保持外部和内部头文件导入分开）
回答by Mircea Ispas
Considering you have src1 and src2 folders in same folder. You have 2 solutions for this:
考虑到您在同一文件夹中有 src1 和 src2 文件夹。您有 2 个解决方案：
1 - #include "../src2/header.h"
1 - #include "../src2/header.h"
2 - Add in your project at additional include directories src2 and use normal #include
2 - 在您的项目中添加额外的包含目录 src2 并使用普通的 #include
