Simple problem

[s410i]

Hello!
I just started learning qt and I have some questions. I've write a simple program but something is wrong. When the button is clicked() it should write a value on the LCD Screen but there is only a warning: ''Object::connect: No such slot QLCDNumber::display(5)'' ,but I've read that there is a slot like 'display(int num)'

#include <QApplication>
#include <QFont>
#include <QPushButton>
#include <QWidget>
#include <QLCDNumber>
 
class MyWidget : public QWidget
{		
	public:
		MyWidget(QWidget *parent = 0);
};
 
MyWidget::MyWidget(QWidget *parent)
	: QWidget(parent)
{
 
	setFixedSize(200,120);
 
	QPushButton *quit = new QPushButton(tr("Click"),this);
	QLCDNumber *lcd = new QLCDNumber(2,this);
	quit -> setGeometry(62,40,75,30);
	quit -> setFont(QFont("Times", 18, QFont::Black, true));
	connect(quit,SIGNAL(clicked()),lcd,SLOT(display(5)));
 
}
 
int main(int argc, char *argv[])
{
	QApplication app(argc,argv);
 
	MyWidget widget;
	widget.show();
 
return app.exec();
}

#include <QApplication>
#include <QFont>
#include <QPushButton>
#include <QWidget>
#include <QLCDNumber>

class MyWidget : public QWidget
{		
	public:
		MyWidget(QWidget *parent = 0);
};

MyWidget::MyWidget(QWidget *parent)
	: QWidget(parent)
{

	setFixedSize(200,120);

	QPushButton *quit = new QPushButton(tr("Click"),this);
	QLCDNumber *lcd = new QLCDNumber(2,this);
	quit -> setGeometry(62,40,75,30);
	quit -> setFont(QFont("Times", 18, QFont::Black, true));
	connect(quit,SIGNAL(clicked()),lcd,SLOT(display(5)));

}

int main(int argc, char *argv[])
{
	QApplication app(argc,argv);

	MyWidget widget;
	widget.show();

return app.exec();
}

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Thanks, for the answers.

[awhite1159]

I am a beginner myself but in the reading I have been doing, it was made clear that you cannot declare the parameter names or pass values in the SLOT() of a connect(). You need to change your SLOT(display(5)) to SLOT(display(int)). This slot displays the property which reflects the current value stored by QLCDNumber

[Fatla]

I 'd the same problem but it has been solved .
You can find "How to make your Slots " :

http://www.qtcentre.org/forum/f-qt-p...lot-13980.html

[wysota]

http://www.qtcentre.org/forum/faq.ph...ot_with_values