如何在C中创建自己的头文件? [英] How do I make my own header file in C?

问题描述

我试图制作自己的头文件，但它不起作用 vim 说

I tried to make my own header file but it doesn't work vim says

wget.h:2:2: error: invalid preprocessing directive #ifndef__WGET_H__
wget.h:3:2: error: invalid preprocessing directive #define__WGET_H__
wget.h:7:2: error: #endif without #if

我的代码是这样的:

//wget header file
#ifndef__WGET_H__
#define__WGET_H__

int my_wget (char web_address[]);

#endif /*__WGET_H__*/

对我来说似乎很好(我阅读的示例与我的示例非常相似)，我不知道出了什么问题.有什么想法吗?

it seems fine to me (the examples I have read are much alike with mine) and I don't know what went wrong. Any ideas?

推荐答案

一切都正确，只是缺少了空间.

Everything is right , just the space was missing.

#ifndef __WGET_H__
#define __WGET_H__

int my_wget (char web_address[]);

#endif __WGET_H__

您通常会在标头文件中使用上述内容，因为在您的项目中，如果偶然(偶然)多次包含相同的标头，则像这样编写标头将确保它包含标头只有一次.

You would generally use the above , in header files , because , in your project , if you happen(by accident) to include the same header multiple times , then writing the header like this will make sure , that it includes the header only once.

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