在哪里放置包含语句、标题或来源? [英] Where to put include statements, header or source?

问题描述

我应该将包含在头文件中还是源文件中?如果头文件包含包含语句，那么如果我在源文件中包含该头文件，那么我的源文件是否会包含我的头文件中的所有包含文件?还是应该只将它们包含在我的源文件中?

Should I put the includes in the header file or the source file? If the header file contains the include statements, then if I include that header file in my source, then will my source file have all of the included files that were in my header? Or should I just include them in my source file only?

推荐答案

只有在 header 本身需要的时候才将 include 放在 header 中.

Only put includes in a header if the header itself needs them.

例子:

• 您的函数返回类型 size_t.然后#include <stddef.h>在header文件中.
• 您的函数使用 strlen.然后在source文件中#include <string.h>.

• Your function returns type size_t. Then #include <stddef.h> in the header file.
• Your function uses strlen. Then #include <string.h> in the source file.

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