为什么不显式#include .c文件? [英] Why not explicitly #include .c files?

问题描述

在C程序中，我看到.h文件始终使用以下方式明确包含:

In the C programs I've seen .h files are always explicitly included using:

#include "some_header_file.h"

另一方面，.c文件很少使用:

On the other hand .c files are very rarely included using:

#include "some_c_file.c"

三个问题:

1. 为什么有区别?

1. Why the difference?

您何时会偏离常规并明确包含.c文件?

When would you divert from the norm and include a .c file explicitly?

链接器如何知道项目中包含必需的.c文件以及在何处查找?

How does the linker know that a required .c file is included in the project and where to look for it?

推荐答案

为什么不同?

坚持模块化设计方法.

您何时会偏离常规并明确包含.c文件?

When would you divert from the norm and include a .c file explicitly?

大多数从不.

链接器如何知道项目中包含所需的.c文件以及在何处查找?

How does the linker know that a required .c file is included in the project and where to look for it?

链接器不需要.c文件，而需要编译器(在此问题中)从.c文件创建的.o文件(例如).这些.o文件所在的位置，链接程序由其调用方(IDE，makefile，用户)告知.

The linker does not need .c files, but .o files (for example) created by a compiler (in this question's context) from .c files. Where those .o files are located the linker is told by its caller (IDE, makefile, user).

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