刚开始学习用VC++调用matlab生成的DLL,找了网上一些资料,难以找到vs2008与MATLAB2009b版本的,按照以往版本做的总是有很多错误。经过两天努力,终于调试成功,这里将经验总结一下,以供有需要的人们参考。

实验环境:

Win7

MATLAB 2009b(安装路径:E:/Program Files/MATLAB/R2009a)

VS2008 中文版(安装路径:E:/Program Files/Microsoft Visual Studio 9.0)

1.Matlab 生成DLL

1.1编译器的安装

在matlab中先安装编译器,我在第一次安装的时候一路y下来,只有一个compiler,还是最老的。这教育我们要学会说N,按照以下步骤操作

>> mbuild -setup

Please choose your compiler for building standalone MATLAB applications:

 

Would you like mbuild to locate installed compilers [y]/n? n

 

Select a compiler:

[1] Lcc-win32 C 2.4.1

[2] Microsoft Visual C++ 6.0

[3] Microsoft Visual C++ .NET 2003

[4] Microsoft Visual C++ 2005 SP1

[5] Microsoft Visual C++ 2008 Express

[6] Microsoft Visual C++ 2008 SP1

 

[0] None

 

Compiler: 6

 

The default location for Microsoft Visual C++ 2008 SP1 compilers is C:/Program Files/Microsoft Visual Studio 9.0,

but that directory does not exist on this machine. 

 

Use C:/Program Files/Microsoft Visual Studio 9.0 anyway [y]/n? n

Please enter the location of your compiler: [C:/Program Files/Microsoft Visual Studio 9.0] e:/Program Files/Microsoft Visual Studio 9.0

 (红色部分换成你的vs所安装的地址)

Please verify your choices:

 

Compiler: Microsoft Visual C++ 2008 SP1 

Location: e:/Program Files/Microsoft Visual Studio 9.0

 

Are these correct [y]/n? y

 

****************************************************************************

  Warning: Applications/components generated using Microsoft Visual Studio  

           2008 require that the Microsoft Visual Studio 2008 run-time      

           libraries be available on the computer used for deployment.      

           To redistribute your applications/components, be sure that the   

           deployment machine has these run-time libraries.                 

****************************************************************************

 

Trying to update options file: C:/Users/Administrator/AppData/Roaming/MathWorks/MATLAB/R2009a/compopts.bat

From template:             E:/PROGRA~1/MATLAB/R2009a/bin/win32/mbuildopts/msvc90compp.bat

 

Done . . .

 

1.2 DLL的生成

首先新建一个m文件,文件名为myadd2.m,定义了一个名为myadd2的函数,代码如下:

//

function [y,z] = myadd2(a, b)
% dummy function, just to demonstrate the idea
y = a+b;
z = a+2*b;
end

/

在MATLAB命令框中输入以下命令:

mcc -W cpplib:libmyadd2 -T link:lib myadd2.m

 

生成libmyadd2.lib, libmyadd2.h, libmyadd2.dll 等文件,将这三个文件拷到VS的项目目录下

 

2. VS调用DLL

2.1 新建一个项目,并设置环境

新建一个win32 控制台应用程序,我取的名字是matlabDll2.当然新建其他的项目类型也可以,我这只是个例子。接下来进行配置,在该项目的属性中进行了配置,只对该项目有效。若建新的项目需要重新配置。项目建好后将libmyadd2.lib, libmyadd2.h, libmyadd2.dll拷贝到项目目录下。

首先配置项目属性页/配置属性/C-C++/常规/附加包含目录,请根据自己电脑上软件的安装位置对照设置,2008与2005不同的地方时这里要加两个目录,如下图所示:

其次配置项目属性页/配置属性/链接器/常规/附加库目录,请根据自己电脑上软件的安装位置对照设置,如下图所示:

然后配置项目属性页/配置属性/链接器/输入/附加依赖性,填入libmyadd2.lib mclmcrrt.lib mclmcr.lib ,如下图所示:

在这一步俺可吃了大苦头了,有篇文档只说添加前两项,俺就照做了,结果导致运行失败,找了好长时间也没发现错误,两天的功夫都在找,结果就是因为少填了这一项,还有其他的一些包含lib,比如libmex.lib  libmx.lib ,这里没填,好像是VC6上要配的。

配置到此结束

2.2 编写主程序,调试运行

这段代码是从别处拷来的,是一段完整代码,将它粘到matlabDLL2.cpp 主CPP文件中,调试通过:

//
#include "stdafx.h"
#include <iostream>
#include "mclmcr.h"
#include "mclcppclass.h"
#include "libmyadd2.h"


int _tmain(int argc, _TCHAR* argv[])
{

        std::cout << "Hello world!" << std::endl;
        /* Initialize the MCR */ 
       /* if( !mclInitializeApplication(NULL,0) ) 
        { 
                std::cout << "Could not initialize the application!" << std::endl;
                return -1; 
        } */

        // initialize lib
        if( !libmyadd2Initialize())
        {
                std::cout << "Could not initialize libmyadd2!" << std::endl;
                return -1; 
        }

        try
        {
        // declare and initialize a
        mwArray a(2, 2,  mxDOUBLE_CLASS);
        double *aData;
        aData = new double[4];
        int i;
        for( i=0; i<4; ++i)
        {
                aData[i] = 1.0*i;
        }
        // print output
        std::cout << "a = " << std::endl;
        std::cout << aData[0] << ",/t" << aData[1] << std::endl;
        std::cout << aData[2] << ",/t" << aData[3] << std::endl;

        a.SetData(aData, 4);

        // declare and initialize b
        mwArray b(2, 2,  mxDOUBLE_CLASS);
        b(1,1) = 11.;
        b(1,2) = 12.;
        b(2,1) = 21.;
        b(2,2) = 22.;

        mwArray y(2, 2,  mxDOUBLE_CLASS);
        mwArray z(2, 2,  mxDOUBLE_CLASS);

        // call the function
                myadd2(2, y, z, a, b);

        // copy data from mwArray to C++ objects

        // allocate outputs
        double *yData, *zData;
        yData = new double[4];
        if( yData == NULL )
        {
                std::cout << "Failed to allocate memory for yData!" << std::endl;
                return -1;
        }

        zData = new double[4];
        if( zData == NULL )
        {
                std::cout << "Failed to allocate memory for zData!" << std::endl;
                return -1;
        }

        // copy data from mwArray to C++
        y.GetData(yData, 4);
        z.GetData(zData, 4);

        // print output
        std::cout << "y = " << std::endl;
        std::cout << yData[0] << ",/t" << yData[1] << std::endl;
        std::cout << yData[2] << ",/t" << yData[3] << std::endl;

        std::cout << "z = " << std::endl;
        std::cout << zData[0] << ",/t" << zData[1] << std::endl;
        std::cout << zData[2] << ",/t" << zData[3] << std::endl;

        
        // deallocate memory
        delete [] aData;
        delete [] zData;
        delete [] yData;
        }
        catch( const mwException& e)
        {
          std::cerr << e.what() << std::endl;
                  
        }
        // terminate the lib
        libmyadd2Terminate();

        // terminate MCR
        mclTerminateApplication();


        return 0;
}/

运行结果如下图:

问题

我将代码的标红部分注释掉了,否则会出现错误:

1>c:/users/administrator/documents/visual studio 2008/projects/matlabdll2/matlabdll2/matlabdll2.cpp(14) : error C3861: “mclInitializeApplication_proxy”: 找不到标识符

我不知道为什么,大家在调试的过程如果解决了这个问题,麻烦告诉一声:liufengjk_ok@126.com。

致谢

感谢taohe等网友提供的参考!