Leomedia.h

#include "MusicMetaDatter.h"

#ifndef LEOMEDIA_H
#define LEOMEDIA_H

namespace Leomedia
{
    typedef enum
    {
        read,write
    } FileMode;
}

#endif // LEOMEDIA_H

MusicMetaDatter.h

#ifndef MUSICMetaDATTER_H
#define MUSICMetaDATTER_H

#include "Leomedia.h"
#include <string>

/**
* MetaDATTER
* @Version 1.0.0a
* @Author: Sergio Andrés Ibañez (Leonnears)
* @Twitter: Leonnears
* @Package: Leomedia
*/

    namespace Leomedia
    {
        typedef enum
        {
            mp3,m4a,flac,ape,wavPack,aiff,wav,ogg,tta
        } AudioFileType;

        class MusicMetaDatter
        {
            public:
                MusicMetaDatter(std::string fileName,AudioFileType type,FileMode mode);
                virtual ~MusicMetaDatter();

            private:
                std::string md_fileName;
                AudioFileType md_fileType;
                FileMode md_fileMode;
        };
    }

    #endif // MUSICMetaDATTER_H

MusicMetaDatter.cpp

#include "MusicMetaDatter.h"
#include <string>

Leomedia::MusicMetaDatter::MusicMetaDatter(std::string fileName,FileMode mode)
{
    this -> md_fileName = fileName;
    this -> md_fileType = type;
    this -> md_fileMode = mode;
}

Leomedia::MusicMetaDatter::~MusicMetaDatter()
{
    //dtor
}

MetaDatterTest.cpp

#include <iostream>
#include "Leomedia.h"
#include <string>
using namespace std;

int main()
{
    Leomedia::MusicMetaDatter Meta("troll",Leomedia::mp3,Leomedia::read);
    return 0;
}

当我编译MetaDatterTest时,我收到以下错误：

未定义引用Leomedia :: MusicMetaDatter :: MusicMetaDatter(std :: string,Leomedia :: AudioFileType,Leomedia :: FileMode)’
未定义的引用Leomedia :: MusicMetaDatter :: ~MusicMetaDatter()’
未定义的引用Leomedia :: MusicMetaDatter :: ~MusicMetaDatter()’

所有文件都在同一目录中.我正在使用mingw 4.4.1

有人可以帮我弄这个吗？它使我无法理解.