Signal and Slot Issue

[dlrlsqa1]

I have created a programme with following files
calculator.cpp

#include "calculator.h"
#include "ui_calculator.h"
calculator::calculator(QWidget *parent)
    : QWidget(parent)
{
	//Ui::calculatorClass *cal = new Ui::calculatorClass;
	//ui.setupUi(cal);
	ui.setupUi(this);
	connect (ui.spinBox1, SIGNAL(valueChanged(int)), this, SLOT(setValueLineEditSpinBox1(int & value)));
/*	connect (ui.spinBox2, SIGNAL(valueChanged(int)), calculator, SLOT(setValueLineEditSpinBox2(int & value))); */
	ui.lineEdit->setText("5");
}
 
calculator::~calculator()
{
 
}
//slots
void calculator::setValueLineEditSpinBox1(int &value)
{
	ui.lineEdit->setText(QString::number(value+ui.spinBox2->value()));
}
 
 
void calculator::setValueLineEditSpinBox2(int &value)
{
	ui.lineEdit->setText(QString::number(value+ui.spinBox1->value()));
}

#include "calculator.h"
#include "ui_calculator.h"
calculator::calculator(QWidget *parent)
    : QWidget(parent)
{
	//Ui::calculatorClass *cal = new Ui::calculatorClass;
	//ui.setupUi(cal);
	ui.setupUi(this);
	connect (ui.spinBox1, SIGNAL(valueChanged(int)), this, SLOT(setValueLineEditSpinBox1(int & value)));
/*	connect (ui.spinBox2, SIGNAL(valueChanged(int)), calculator, SLOT(setValueLineEditSpinBox2(int & value))); */
	ui.lineEdit->setText("5");
}

calculator::~calculator()
{

}
//slots
void calculator::setValueLineEditSpinBox1(int &value)
{
	ui.lineEdit->setText(QString::number(value+ui.spinBox2->value()));
}


void calculator::setValueLineEditSpinBox2(int &value)
{
	ui.lineEdit->setText(QString::number(value+ui.spinBox1->value()));
}

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calculator. h file

#ifndef CALCULATOR_H
#define CALCULATOR_H
 
#include <QtGui/QWidget>
#include "ui_calculator.h"
 
class calculator : public QWidget
{
    Q_OBJECT
 
public:
    calculator(QWidget *parent = 0);
    ~calculator();
 
signals:
/*    int valuespinBox1();
    int valuespinBox2();
*/
public slots:
    void setValueLineEditSpinBox1(int &value);
    void setValueLineEditSpinBox2(int &value);
 
 
 
private:
    Ui::calculatorClass ui;
};
 
#endif // CALCULATOR_H

#ifndef CALCULATOR_H
#define CALCULATOR_H

#include <QtGui/QWidget>
#include "ui_calculator.h"

class calculator : public QWidget
{
    Q_OBJECT

public:
    calculator(QWidget *parent = 0);
    ~calculator();

signals:
/*    int valuespinBox1();
    int valuespinBox2();
*/
public slots:
    void setValueLineEditSpinBox1(int &value);
    void setValueLineEditSpinBox2(int &value);



private:
    Ui::calculatorClass ui;
};

#endif // CALCULATOR_H

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main.cpp file

#include "calculator.h"
#include "ui_calculator.h"
 
#include <QtGui>
#include <QApplication>
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    calculator w;
    w.show();
    return a.exec();
}

#include "calculator.h"
#include "ui_calculator.h"

#include <QtGui>
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    calculator w;
    w.show();
    return a.exec();
}

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I get an error as below
No symbol "auto" in current context.
warning: Object::connect: No such slot calculator::setValueLineEditSpinBox1(int&value)

warning: Object::connect: (sender name: 'spinBox1')

warning: Object::connect: (receiver name: 'calculatorClass'
what is the issue in signal and slot not able to understand

can anybody help please?

[spirit]

try this

connect (ui.spinBox1, SIGNAL(valueChanged(int)), this, SLOT(setValueLineEditSpinBox1(int)));
....
public slots:
    void setValueLineEditSpinBox1(int value);
    void setValueLineEditSpinBox2(int value);

connect (ui.spinBox1, SIGNAL(valueChanged(int)), this, SLOT(setValueLineEditSpinBox1(int)));
....
public slots:
    void setValueLineEditSpinBox1(int value);
    void setValueLineEditSpinBox2(int value);

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I don't see any sense form pass values in this form int &value for simple types of course.

[dlrlsqa1]

I had done that earlier
The programm compiles properly but i do not get expected result

I expect spinBox1 value to be added to spinBox2 value and displayed in lineedit
spinBox value changes but the value is not displayed in the lineedit?
where is the problem ?

Help me

[spirit]

did you make changes as I've posted above? if yes, then everything must work.

[wysota]

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

[dlrlsqa1]

Thanks Dear spirit and Dear Wysota

Program Works!
Thanks for helping a newbie