包括来自其他目录的标头时

包括来自其他目录的标头时

本文介绍了包括来自其他目录的标头时,Visual Studio链接错误的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

简短的问题是:如何使用Visual Studio创建/编译/运行在不同目录中具有源代码的项目.

以下是详细信息:

我在一个目录中有一个类定义文件(.hpp)和实现文件(.cpp),在另一个目录中有一个main.cpp文件.在Visual Studio 2008中,我创建了一个新项目,并将main.cpp放入该项目中.我将类文件目录添加到其他包含目录(在项目上单击鼠标右键->项目属性->配置属性-C/C ++-常规->其他包含目录= C:\ Test \ cpp).

I have an class definition file (.hpp) and implementation file (.cpp) in one directory and I have a main.cpp file in another directory. In Visual Studio 2008, I created a new project and put main.cpp in that project. I added the class file directory to Additional Include Directories (right click on the project -> project properties -> Configuration Properties - C/C++ - General -> Additional Include Directories = C:\Test\cpp).

当我这样做时,在编辑main.cpp时intellisense可以正常工作.生成项目时,它可以正常编译,但是出现链接错误,例如:

When I do this, intellisense works fine when editing main.cpp. When I Build the project, it compiles fine, but I get link errors such as:

据我所知,Visual Studio实际上并没有编译Test.cpp(我看不到为其创建任何.obj文件).我尝试过在编译/构建main.cpp之前单独进行编译,但这没有任何区别.有没有解决的办法?当我在网上搜索答案时,我看到很多人忘记为链接程序添加库,但是我没有处理任何库.

As far as I can tell, Visual Studio isn't actually compiling Test.cpp (I don't see any .obj files being made for it). I have tried compiling it separating, before Compiling/Building main.cpp, but that didn't make any difference. Is there a way around this? When I search the web for answers, I see a lot of people forgetting to include libraries for the linker, but I'm not dealing with any libraries.

我还通过将Test.hpp和Test.cpp移到与main.cpp相同的目录中,验证了此代码可编译并正常运行-正常工作.我只是坚持使用该设置,但是我需要能够将不同目录的源用于我正在处理的项目.

I have also verified this code compiles and runs correctly by moving Test.hpp and Test.cpp to the same directory as main.cpp - that worked without any problems. I would just stick with that setup, but I need to be able to use source from different directories for a project I'm working on.

这是3个文件:

  1. C:\ Test \ cpp \ Test.hpp

  1. C:\Test\cpp\Test.hpp

#ifndef TEST_H
#define TEST_H

class Test
{
private:
  int mynum;

public:
  Test();
  int add(int num);

};
#endif //TEST_H

  • C:\ Test \ cpp \ Test.cpp

  • C:\Test\cpp\Test.cpp

    #include "Test.hpp"
    
    Test::Test()
    {
      mynum = 0;
    }
    
    int Test::add(int num)
    {
      return mynum += num;
    }
    

  • C:\ Visual Studio Projects \ MyProject \ main.cpp

  • C:\Visual Studio Projects\MyProject\main.cpp

    #include <iostream>
    #include <Test\Test\Test.hpp>
    
    int main(int argc, char *argv[])
    {
      Test test;
      std::cout << "Add 5 = " << test.add(5) << std::endl;
      return 0;
    }
    

  • 推荐答案

    最重要的是,您必须编译Test.cpp并以某种方式与其链接.两种选择:

    The bottom line is that you have to compile Test.cpp and link with it somehow. Two options:

    1. 将Test.cpp添加到您的项目中
    2. 创建一个库项目,例如TestLib.将Test.cpp添加到该项目并进行编译.然后将您的主项目与TestLib链接.

    在第二种情况下,您可以在VisualStudio中具有相关项目.这样,它将正确地提取适当的Debug/Release/etc.构建主项目时的库版本.它还将从正确的文件夹中获取它.例如.无需手动修改链接器设置.

    In second case you can have dependent projects in VisualStudio. This way it will properly pull proper Debug/Release/etc. version of the lib when you build your main project. It will also get it from the right folder. E.g. no need to mess with linker settings manually.

    这篇关于包括来自其他目录的标头时,Visual Studio链接错误的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

    08-21 08:29