如何跨多个文件使用命名空间

I notice that C++'s std namespace is spread across several files (like in vector, string, iostream, etc.). How can I accomplish the same thing in my programs? Do I simply declare the same namespace in each individual header file, so that it's something like:

我注意到C ++的std命名空间分布在几个文件中(比如vector,string,iostream等)。我如何在我的程序中完成同样的事情?我是否只是在每个单独的头文件中声明相同的命名空间,因此它类似于:

a.h

namespace something
{
class A {};
}

b.h

#include "a.h"

namespace something
{
class B : public A {};
}

And then in, say, main.cpp, I would just include "b.h" and "a.h" and then using namespace something; to use the two classes?

然后在main.cpp中,我只需要包含“b.h”和“a.h”,然后使用命名空间;使用这两个类?

1 个解决方案

#1

Yes, that is exactly how to do it.

是的,这正是如何做到的。