Somthing wrong with the pointers???

[skorefish]

Hey, the first part is working code

      QFile file("c:/test/test.txt");
    QFile *pFile=&file;
    if(!pFile->open(QIODevice::WriteOnly)){
        qDebug("file didn't open ");
        return;
    }
    //write to file
    QDataStream out(pFile);
    out.setVersion(QDataStream::Qt_5_4);
    QDataStream *pStream=&out;
    *pStream << MyNum << map << comp;
    pFile->flush();
    pFile->close();

now I want to put everything in a class,
but it doesn't work

void main
{

    Serializer sO("c:/test/test.txt");
    QDataStream *pStream = sO.getObject();
   * pStream<< MyNum << map << comp;
    sO.writeToFile();
}
class Serializer
{
public:
    Serializer();
    Serializer(QString filePath);
    ~Serializer();

   // QDataStream *pStream;

    QDataStream * getObject()
    {
        QFile file(this->filePath);
        this->pFile = & file;
       // QFile *pFile = & file;

        if(!file.open(QIODevice::WriteOnly)){
            qDebug("file didn't open ");
            return nullptr;
        }
        //write to file

        QDataStream out(this->pFile);
        out.setVersion(QDataStream::Qt_5_4);
       // out << MyNum << map << comp
        QDataStream *pOut = &out;
        return pOut;


    }
    void writeToFile()
    {
       (*(this->pFile)).flush();
       (*(this->pFile)).close();
    }

private:
    QString filePath;
    QFile *pFile; // enkel intern nodig

};

[coder777]

Both file and out are local variables. They are destroyed as soon as the function ends. Thus you cannot use pointers to them outside of their function. Use new in this case.

[skorefish]

ok, yes of course... the pointer survives but not the object...

thanx very much