C++ 如何在 Visual Studio 2012 中包含库？
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How to include libraries in Visual Studio 2012?
提问by Northys
I started with learning C++ a few days ago and I would like to get some data to make it more funny. I found a powerful C++ library called Unirestthat can help me to get data from many APIs and after practice the basics :)
几天前我开始学习C++，我想得到一些数据，让它变得更有趣。我找到了一个名为 Unirest 的强大 C++ 库，它可以帮助我从许多 API 中获取数据，并在练习基础知识后：)
I don't know how to include libraries into my project. I fond some videos about how to do it so I just created libsfolder (like i always do when I'm programming in PHP) and I copied library files. After I included header file UNIRest.hinto my source and added the libsdirectory into VS+ Directories option in Project Properties - Configuration Properties - VC+ Directories. Everything is still OK. But when I opened the header file UNIRest.hthe problem appeared:
我不知道如何将库包含到我的项目中。我喜欢一些关于如何做到这一点的视频，所以我刚刚创建了libs文件夹（就像我在用 PHP 编程时经常做的那样）并复制了库文件。在我将头文件包含UNIRest.h到我的源代码中并将libs目录添加到项目属性 - 配置属性 - VC+ 目录中的VS+ 目录选项之后。一切都还好。但是当我打开头文件时UNIRest.h，问题出现了：
#import "UNIHTTPRequest.h"
#import "UNIHTTPRequestWithBody.h"
#import "HttpRequest/UNISimpleRequest.h"
#import "HttpRequest/UNIBodyRequest.h"
#import "HttpResponse/UNIHTTPBinaryResponse.h"
#import "HttpResponse/UNIHTTPJsonResponse.h"
#import "HttpResponse/UNIHTTPStringResponse.h"
All of those macros are underlined and compilation failed with message:
所有这些宏都带有下划线并且编译失败并显示消息：
fatal error C1083: Cannot open type library file: 'libs\unirest\unihttprequest.h': Error loading type library/DLL.
Could you please help me? Hope it's not just a stupid question because I tried to make it works whole afternoon :(
请你帮助我好吗？希望这不仅仅是一个愚蠢的问题，因为我试图让它整个下午都有效:(
回答by hauron
Typically you need to do 5 things to include a library in your project:
通常你需要做 5 件事来在你的项目中包含一个库：
1) Add #include statements necessary files with declarations/interfaces, e.g.:
1) 添加#include 语句所需的带有声明/接口的文件，例如：
#include "library.h"
2) Add an include directory for the compiler to look into
2）添加一个包含目录供编译器查看
-> Configuration Properties/VC++ Directories/Include Directories (click and edit, add a new entry)
-> 配置属性/VC++ 目录/包含目录（单击并编辑，添加新条目）
3) Add a library directory for *.lib files:
3) 为 *.lib 文件添加一个库目录：
-> project(on top bar)/properties/Configuration Properties/VC++ Directories/Library Directories (click and edit, add a new entry)
-> 项目（在顶部栏）/属性/配置属性/VC++ 目录/库目录（单击并编辑，添加新条目）
4) Link the lib's *.lib files
4）链接lib的*.lib文件
-> Configuration Properties/Linker/Input/Additional Dependencies (e.g.: library.lib;
-> 配置属性/链接器/输入/附加依赖项（例如：library.lib；
5) Place *.dll files either:
5) 放置 *.dll 文件：
-> in the directory you'll be opening your final executable from orinto Windows/system32
-> 在您将在Windows/system32 中打开或打开最终可执行文件的目录中
回答by SridharKritha
In code level also, you could add your lib to the project using the compiler directives #pragma.
同样在代码级别，您可以使用编译器指令#pragma将您的库添加到项目中。
example:
例子：
#pragma comment( lib, "yourLibrary.lib" )
