QT and C++ class problem

[ricardochamie]

Ok! First time here at QtCentre. Thanks in advance for the help!
I know where my problem is... but don't know how to fix it!

Compiler Output

widget.cpp:4: error: default argument given for parameter 4 of 'Widget::Widget(const QString&, const QString&, const QString&, QWidget*)'
widget.h:16: error: after previous specification in 'Widget::Widget(const QString&, const QString&, const QString&, QWidget*)'

widget.cpp:4: error: default argument given for parameter 4 of 'Widget::Widget(const QString&, const QString&, const QString&, QWidget*)'
widget.h:16: error: after previous specification in 'Widget::Widget(const QString&, const QString&, const QString&, QWidget*)'

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My widget.h code

#ifndef WIDGET_H
#define WIDGET_H
 
#include <QWidget>
#include <QString>
 
namespace Ui {
    class Widget;
}
 
class Widget : public QWidget
{
    Q_OBJECT
 
public:
    explicit Widget(const QString &button_nome, const QString &button_potencia, const QString &button_count, QWidget *parent = 0); //here is the problem
    ~Widget();
 
private:
    Ui::Widget *ui;
 
private slots:
    void ContaClick();
 
};
 
#endif // WIDGET_H

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QString>

namespace Ui {
    class Widget;
}

class Widget : public QWidget
{
    Q_OBJECT

public:
    explicit Widget(const QString &button_nome, const QString &button_potencia, const QString &button_count, QWidget *parent = 0); //here is the problem
    ~Widget();

private:
    Ui::Widget *ui;

private slots:
    void ContaClick();

};

#endif // WIDGET_H

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My widget.cpp code

#include "widget.h"
#include "ui_widget.h"
 
Widget::Widget(const QString &button_nome, const QString &button_potencia, const QString &button_count, QWidget *parent = 0) : 
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
 
    ui->button_name->setFixedSize(121,61);
    ui->button_name->setText(button_nome);
    ui->label_count->setText(button_count);
    ui->label_Pot_kW->setText(button_potencia);
 
    connect (ui->button_name,SIGNAL(clicked()),this,SLOT(ContaClick()));
}
 
Widget::~Widget()
{
    delete ui;
}
 
 
void Widget::ContaClick() {
 
int i = ui->label_count->text().toInt(); //transforma o label em um inteiro "i"
i++; // incrementa o inteiro "i" em uma unidade
ui->label_count->setNum(i);  //atribui ao label o valor de "i"

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(const QString &button_nome, const QString &button_potencia, const QString &button_count, QWidget *parent = 0) : 
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);

    ui->button_name->setFixedSize(121,61);
    ui->button_name->setText(button_nome);
    ui->label_count->setText(button_count);
    ui->label_Pot_kW->setText(button_potencia);

    connect (ui->button_name,SIGNAL(clicked()),this,SLOT(ContaClick()));
}

Widget::~Widget()
{
    delete ui;
}


void Widget::ContaClick() {

int i = ui->label_count->text().toInt(); //transforma o label em um inteiro "i"
i++; // incrementa o inteiro "i" em uma unidade
ui->label_count->setNum(i);  //atribui ao label o valor de "i"

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[aamer4yu]

You dont have to give the default values in .cpp file.
You just give them in declaration.

Widget::Widget(const QString &button_nome, const QString &button_potencia, const QString &button_count, QWidget *parent /*= 0 */) :   
    QWidget(parent),
    ui(new Ui::Widget)

Widget::Widget(const QString &button_nome, const QString &button_potencia, const QString &button_count, QWidget *parent /*= 0 */) :   
    QWidget(parent),
    ui(new Ui::Widget)

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[tbscope]

Delete the "= 0" from the implementation

Doh, too late :-)

[wysota]

And remove the "explicit" keyword, it's not needed for constructors with more than one parameter.

[ricardochamie]

Thank you very much! The problem is now solved!