Another Unhandled Exception Error

Hi im trying to make a sudoku game...

What I want to do is make a Sudoku game that will be able to read from a file
and fill the vector< vector<int> > respectively but before I worked on the Sudoku class I have started working on a FileHandler class (I know I can just use fstream , ifstream , or ofstream) and I keep getting this Error

Unhandled exception at 0x5A3BF05D (msvcp110d.dll) in Console Sudoku.exe: 0xC0000005: Access violation reading location 0x00000000.

This is the main file:

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#include "FileHandler.h"

int main(int nArgs , char* pszArgs){
	
	FileHandler fh("log.txt");
		fh << "Please Work!";

	system("PAUSE");

	return EXIT_SUCCESS;
}


This is the function i am trying to call is:

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void FileHandler::operator<< (char* message){
	write(message);
}


 
//// some code later 


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void FileHandler::write(char* message){
	o_Open(); //// opens the file 

    if(m_ofFile.good() && m_ofFile.is_open() && !m_ofFile.fail())
        try{

            m_ofFile << message;

            if(m_ofFile.bad() || m_ofFile.fail() || !m_ofFile){
				char*		 emessage;
					sprintf( emessage, "File %s corrupted" , m_cFileName_ptr);
                throw Error( emessage , BAD , 2);
            }

			m_ofFile.close();

        }
        catch(Error e){
            cerr << e.getMessage() << "  ERROR STATUS: ";

            switch(e.getErrorType()){
                case OK:{
                    cerr << "OK";
                }break;
                case BAD:{
                    cerr << "BAD";
                    e.displayError();
                }break;
                case HORRIBLE:{
                    cerr << "HORRIBLE";
                    e.displayError();
                    exit(0);
                }break;
            }

        }
        catch(...){
            cerr << "Unknown Error Occured";
            exit(0);
        }

    else{
        cerr << "Could not write to file";
        m_ofFile.clear();
	}

	o_Close();  //// just closes the file w/ m_ofFile.close()
}


Then here is the Open function

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void FileHandler::o_Open(){
	if(m_ofFile.is_open()){
		o_Close();
		m_ofFile.open(m_cFileName_ptr);
	}
    else{
		m_ofFile.open(m_cFileName_ptr);
    }

}


The error object is fine i debugged it and get no problems.

please help i am utterly confused. Thanks in advanced
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    char* emessage            // emessage points to some random place in memory.
    sprintf( emessage, "File %s corrupted" , 
        m_cFileName_ptr);     // write to some random place in memory. 


However since the error is from reading, I suspect m_cFileName_ptr is also not kosher.
Last edited on
What do you mean? (in respects to m_cFileName_ptr not being kosher)

here is some more information on that variable:

m_cFileName_ptr is a char* and a member variable of class FileHandler
┬┐what's its value?

By the way, void FileHandler::write(const char* message)
Last edited on
The value is set In the constructor

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 FileHandler::FileHandler(char* location){
     setFile(location);
} 


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void FileHandler::setFile(char* location){
     m_cFileName_ptr = location;
}
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