Sir, Find error in this code? Why am i not able to draw the symbols?

[sonulohani]

class Symbol:public QwtSymbol{
 
public:
    Symbol(QwtSymbol *p=0);
    void drawSymbols(QPainter * painter, const QPointF * point, int numPoints) const;
};
Symbol::Symbol(QwtSymbol *p):QwtSymbol(p){
 
}
 
void Symbol::drawSymbols(QPainter *painter, const QPointF *point, int numPoints) const{
    QPixmap *pixx;
    pixx->load(":/Images/AlarmEvent.png");
    painter->drawPixmap(point,pixx);
}
 
 
// in constructor---->
Symbol *symb;
 QPainter *pnt;
    for(int i=0;i<yData_1.size();i++){
      const QPointF point(xData_1.at(i),yData_1.at(i));
      mark_1[i]=new QwtPlotMarker;
       symb=new Symbol(QwtSymbol::drawSymbols(pnt, &point, 1));
      mark_1[i]->setSymbol(symb);
      mark_1[i]->setValue(xData_2.at(i),yData_2.at(i));
      mark_1[i]->attach(plot);
     }

class Symbol:public QwtSymbol{

public:
    Symbol(QwtSymbol *p=0);
    void drawSymbols(QPainter * painter, const QPointF * point, int numPoints) const;
};
Symbol::Symbol(QwtSymbol *p):QwtSymbol(p){

}

void Symbol::drawSymbols(QPainter *painter, const QPointF *point, int numPoints) const{
    QPixmap *pixx;
    pixx->load(":/Images/AlarmEvent.png");
    painter->drawPixmap(point,pixx);
}


// in constructor---->
Symbol *symb;
 QPainter *pnt;
    for(int i=0;i<yData_1.size();i++){
      const QPointF point(xData_1.at(i),yData_1.at(i));
      mark_1[i]=new QwtPlotMarker;
       symb=new Symbol(QwtSymbol::drawSymbols(pnt, &point, 1));
      mark_1[i]->setSymbol(symb);
      mark_1[i]->setValue(xData_2.at(i),yData_2.at(i));
      mark_1[i]->attach(plot);
     }

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Why am i not able to draw the symbol??????

error i am getting is : no matching function for call to 'QPainter::drawPixmap(const QPointF*&, QPixmap*&)'

E:\TempLog_Sonu1\TempLog\TempLogWidget.h:43: error: no matching function for call to 'QwtSymbol::QwtSymbol(QwtSymbol*&)'

[mvuori]

Whenever you see such error message, check that your pointers are ok...

You are trying to load the image file into an uninitialized pointer.
Try this
QPixmap pixx; // Make it a QPixmap, not a pointer to it. If you wish to have a pointer variable, you need to create the piix with 'new' operator
pixx.load(":/Images/AlarmEvent.png");
painter->drawPixmap(*point,pixx); // pass the point reference, not the pointer to it