class function declarations

I'm having trouble with where I write the actual implementation for my functions. If I include them within the class braces, I can instantiate a class object from another .cpp file fine. However, if I move them out of the classes braces and just leave the prototypes, I get linking errors. I can leave them outside of the braces only if I declare them all inline (like they were when they were in the braces).

Here is my code:

Code:

---

#include <iostream.h>
#include <stdio.h>

class MP3File {

private:
        FILE * mp3file;
        bool initialized;
        int bitRate;       

public:
        MP3File();
        MP3File(FILE * file);
        bool parseHeader();
        bool hasBeenInitialized();
        void printHeaderInformation();

};

inline MP3File :: MP3File(){ initialized = false; }

inline MP3File :: MP3File(FILE * file)
{
        mp3file = file;
        initialized = true;
}

inline bool MP3File :: parseHeader()
{
        bitRate = 50;
        return true;
}

inline bool MP3File :: hasBeenInitialized()
{
        return initialized;
}

inline void MP3File :: printHeaderInformation()
{
        cout << "Header information" << endl;
        cout << "Bit Rate: " << bitRate << endl;
}

---

How can I eliminate making them inline but still be allowed to instantiate an MP3File object from another cpp file?

Thanks in advance.

Remove the inline keyword and in the other files where you call them, redeclare each function as extern.

-Prelude

Would it look like :

Code:

---


      extern "C++"{

                MP3File :: MP3File(FILE * file)
      }

---

????????????????????????

Including the header file instead of the cpp file fixed it. Why does that make a difference to the linker?

Because the compiler compiles together the.cpp's,
You must inlcude the .h's