Constructor Error, please assist

[ayanda83]

Hi everyone, I keep on getting the error below when I try to modify the default constructor for a dialogue box. Here is the constructor

explicit NewAccount(QWidget *parent = 0);

explicit NewAccount(QWidget *parent = 0);

To copy to clipboard, switch view to plain text mode 

I want to add a QSqlDatabase object in the constructor so that it looks like this

explicit NewAccount(QWidget *parent = 0, QSqlDatabase db);

explicit NewAccount(QWidget *parent = 0, QSqlDatabase db);

To copy to clipboard, switch view to plain text mode 

but I keep on getting this error. Am I doing something wrong?
13_03_2014.jpg