Thread: 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.

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