Qfile and QDebug help

hi I am new to qt and I was following this tutorial and got everything right but I keep getting error's can any one help

Code:

---

#include <QtGui/QApplication>
#include <QFile>
#include <QString>
#include <QtDebug>
#include <QTextStream>
 
 
void write(QString filename){
    QFile myfile(filename);
 
    if(!(myfile.open(QFile::WriteOnly | QFile::Text))){
 
        qDebug()<<"Could not write to file ";
        return;
    }
    QTextStream out(&myfile);
    out<<"hello world";
 
    myfile.flush();
    myfile.close();
 
}
 
void read(QString filename){
    QFile myfile(filename);
 
    if((myfile.open(QFile::ReadOnly | QFile::Text))){
 
        qDebug()<<"Could not read file";
        return;
 
    }
 
    QTextStream in(&myfile);
    qDebug()<< in.readAll();
    myfile.close();
 
 
}
 
 
int main(int argc, char *argv[]){
    QApplication app(argc,argv);
 
    QString  myfile = "c:/qt/tet.txt";
 
    write(myfile);
    read(myfile);
    return app.exec();
}

---

What was the error with the above code ....You haven't mentioned it..

these are the issues that show up

In function `main':
undefined reference to `_imp___ZN12QApplicationC1ERiPPci' main.cpp line 41
undefined reference to `_imp___ZN12QApplication4execEv' main.cpp 47
undefined reference to `_imp___ZN12QApplicationD1Ev' main.cpp 47
undefined reference to `_imp___ZN12QApplicationD1Ev' main.cpp 47

Refer the below links ...Hope that helps

http://qt-project.org/forums/viewthread/2098

http://www.qtcentre.org/archive/index.php/t-30962.html

What does your PRO file look like?