write copy file template

=========================================
TEMPLATE CLASS
=========================================

template
class CopyFormattedFile {
    ifstream *fin;
    ofstream *fout;
public:
    CopyFormattedFile(const char *fromFileName, const char *toFileName);  // constructor
    ~CopyFormattedFile();  // destructor
    int copy();  // copy file, return 0 when success
};


template
CopyFormattedFile::CopyFormattedFile(const char *fromFileName, const char *toFileName)
{
    fin = new ifstream(fromFileName, ios::in|ios::binary);
    fout = new ofstream(toFileName, ios::out|ios::binary);
}

template
CopyFormattedFile::~CopyFormattedFile()
{
    delete fin;
    delete fout;
}

template
int CopyFormattedFile::copy()
{
    Type rec;
    
    if(!fin->is_open() || !fout->is_open()) {
        return -1;
    }

    while(!fin->fail() && !fout->fail()) {
        fin->read((char *)&rec, sizeof(Type));

        if(fin->gcout() == sizeof(Type)) {    // gcount() function return the last read bytes
            fout->write((char *)&rec, sizeof(Type));
        }
        else {
            return -1;    // file format error
        }
    }

    return fin->feof() ? 0 : -1;   // return 0 only when having copied all content    
}


================================
TEMPLATE FUNCTION:
================================


template
int copy(const char *fromFileName, const char *toFileName)
{
    ifstream *fin = new ifstream(fromFileName, ios::in|ios::binary);
    ofstream *fout = new ofstream(toFileName, ios::out|ios::binary);
    Type rec;
    
    if(!fin->is_open() || !fout->is_open()) {
        return -1;
    }

    while(!fin->fail() && !fout->fail()) {
        fin->read((char *)&rec, sizeof(Type));

        if(fin->gcout() == sizeof(Type)) {    // gcount() function return the last read bytes
            fout->write((char *)&rec, sizeof(Type));
        }
        else {
            return -1;    // file format error
        }
    }

    int ret = fin->feof() ? 0 : -1;   // return 0 only when having copied all content

    delete fin;
    delete fout;

    return ret;    
}