在另一个头文件中包含一个头文件 [英] Include a header in another header file

问题描述

我在 .h 文件中定义了一个 struct item.现在我在另一个 .h 中定义另一个 struct tPCB 这是同一个项目的一部分，我需要 tPCB 有一个 item.我认为仅仅制作同一个 TurboC 项目的一部分就可以让我在另一个头文件中使用 item，但是编译器会抛出undefined type:ite".

I've defined a struct item in a .h file. Now I'm defining another struct tPCB in another .h which is part of the same project, and I need the tPCB to have an item. I thought that just making part of the same TurboC project would allow me to use item in the other header file, but the compiler throws me "undefined type: ite".

我想我必须以某种方式在第二个标题中包含第一个标题，但是我看到了相同的类似代码，但不这样做.

I guess I somehow have to include the first header on the second one, However I have seen the same a similar code which works without doing so.

除了添加 #include 行之外，还有其他方法可以让它工作吗?

Is there any other way than just adding an #include line to make it work?

推荐答案

如果你的 .c #includes 这两个 .h 文件的顺序正确，它会起作用.这可能就是你记得的案例中发生的事情.最安全的做法是 #include 每个定义依赖项的文件，并依靠每个 .h 中的包含保护来防止被多次定义.

If your .c #includes the two .h files in the proper order, it will work. That's probably what happened in the case you remember. The safest course is to #include every file that defines your dependencies, and rely on the include guards in each .h to keep things from being multiply defined.

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