Private member declared in other class
===

I'm programming my first big "class" in a c++ program (it deals with I/O stream) and I think I understood the concepts of object, methods and attributes.
Though I guess I still don't get all the rights of the encapsulation notion,
because I want my class called File to have

- a name (the path of the file),
- a reading stream, and
- a writing stream

as attributes,

and also its first method to actually get the "writing stream" attribute of the File object... 

    #include <string>
    #include <fstream>
    
    class File {
    public:
    	File(const char path[]) : m_filePath(path) {}; // Constructor
    	File(std::string path) : m_filePath(path) {}; // Constructor overloaded
    	~File(); // Destructor
    	static std::ofstream getOfstream(){ // will get the private parameter std::ofStream of the object File
    		return m_fileOStream;
    	};
    private:
    	std::string m_filePath; // const char *m_filePath[]
    	std::ofstream m_fileOStream;
    	std::ifstream m_fileIStream;
    };

But I get the error: 

> Error 4 error C2248: 'std::basic_ios<_Elem,_Traits>::basic_ios' :
> cannot access private member declared in class
> 'std::basic_ios<_Elem,_Traits>' c:\program files (x86)\microsoft
> visual studio 10.0\vc\include\fstream 1116

reporting me to the following part of fstream.cc :

    private:
    	_Myfb _Filebuffer;	// the file buffer
    	};

Could you then help me to fix this and be able to use a stream as parameter of my class please? I have tried to return a reference instead of the stream itself, but I'm gonna need some help with that as well (doesn't work either...).
Thanks in advance