I am doing the example on dialogs from C++ gui programming with QT 4

I have finddialog.h as [code]

ifndef FINDDIALOG_H

define FINDDIALOG_H

include <QDialog>

class QCheckBox; class QLabel; class QLineEdit; class QPushButton;

class FindDialog : public QDialog { Q_OBJECT

public : FindDialog(QWidget *parent = 0);

signals: void findNext(const QString &str,Qt::CaseSensitivity cs); void findPrevious(const QString &str,Qt::CaseSensitivity cs);

private slots: void findClicked(); void enableFindButton(const QString &text); private: QLabel *label; QLineEdit *lineEdit; QCheckBox *caseCheckBox; QCheckBox *backwardCheckBox; QPushButton *findButton; QPushButton *closeButton;

endif

[/code]

finddialog.cpp [code]

include <QtGui>

include "finddialog.h"

FindDialog::FindDialog(QWidget *parent) : QDialog(parent) { label = new QLabel(tr("Find &what:")); lineEdit = new QLineEdit; label->setBuddy(lineEdit);

 caseCheckBox = new QCheckBox(tr("Match &case"));
 backwardCheckBox = new QCheckBox(tr("Search &backward"));
 findButton = new QPushButton(tr("&Find"));
 findButton->setDefault(true);
 findButton->setEnabled(false);
 closeButton = new QPushButton(tr("Close"));
connect(lineEdit,SIGNAL(textChanged(const QString &)),this,SLOT(enableFindButton(const QString &)));
connect(findButton,SIGNAL(clicked()),this,SLOT(findClicked()));
connect(closeButton,SIGNAL(clicked()),this,SLOT(close()));
QHBoxLayout *topLeftLayout = new QHBoxLayout;

topLeftLayout->addWidget(label); topLeftLayout->addWidget(lineEdit);

QVBoxLayout *leftLayout = new QVBoxLayout; leftLayout->addLayout(topLeftLayout); leftLayout->addWidget(findButton); leftLayout->addWidget(backwardCheckBox);

QVBoxLayout *rightLayout = new QVBoxLayout; rightLayout->addLayout(leftLayout); rightLayout->addLayout(rightLayout); rightLayout->addStretch();

QHBoxLayout *mainLayout = new QHBoxLayout; mainLayout->addLayout(leftLayout); mainLayout->addLayout(rightLayout); setLayout(mainLayout);

setWindowTitle(tr("Find")); setFixedHeight(sizeHint().height()); }

void FindDialog :: findClicked() { QString text = lineEdit->text(); Qt:: CaseSensitivity cs = caseCheckBox->isChecked() ? Qt::CaseSensitive : Qt::CaseInsensitive; if(backwardCheckBox->isChecked()) { emit findPrevious(text,cs); } else{ emit findNext(text,cs); } } void FindDialog :: enableFindButton(const QString &text) { findButton->setEnabled(!text.isEmpty());

} } [/code]

main.cpp [code]

include <QApplication>

include "finddialog.h>

int main(int argc,char *argv[]) { QApplication app(argc,argv); FindDialog *dialog = new FindDialog; dialog->show(); return app.exec(); } [/code]

[code] utkarsh@utkarsh-laptop:~/programming/qt/dialog$ ls dialog.pro finddialog.cpp finddialog.h main.cpp Makefile utkarsh@utkarsh-laptop:~/programming/qt/dialog$ make g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I. -I. -o finddialog.o finddialog.cpp finddialog.cpp:3: error: extra qualification ‘FindDialog::’ on member ‘FindDialog’ finddialog.cpp:3: error: ‘FindDialog::FindDialog(QWidget*)’ cannot be overloaded finddialog.h:14: error: with ‘FindDialog::FindDialog(QWidget*)’ finddialog.cpp:44: error: extra qualification ‘FindDialog::’ on member ‘findClicked’ finddialog.cpp:44: error: ‘void FindDialog::findClicked()’ cannot be overloaded finddialog.h:21: error: with ‘void FindDialog::findClicked()’ finddialog.cpp:56: error: extra qualification ‘FindDialog::’ on member ‘enableFindButton’ finddialog.cpp:56: error: ‘void FindDialog::enableFindButton(const QString&)’ cannot be overloaded finddialog.h:22: error: with ‘void FindDialog::enableFindButton(const QString&)’ finddialog.cpp:60: error: expected unqualified-id at end of input make: *** [finddialog.o] Error 1 utkarsh@utkarsh-laptop:~/programming/qt/dialog$ nano finddialog.cpp utkarsh@utkarsh-laptop:~/programming/qt/dialog$ [/code]

error: Date.cpp:16:12: error: extra qualification ‘Time::’ on member ‘operator+’ [-fpermissive] const Time Time::operator+(const Time &other) ;

What is this? How do I remove this error?

it run fine with Visual Studio

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# include <iostream> 

# include <iomanip> 
using std::cout; 
using std::setfill; 
using std::setw; 
using std::cin; 
using std::cout; 
using std::endl; 
class Time 
{ 
public: 
Time( int = 0, int = 0 ); 
const Time Time::operator+(const Time &other) ; 
void setTime( int, int); 
void setHour( int ); 
void setMinute( int ); 
int getHour() const; 
int getMinute() const; 
void Time::get( ); 
void Time::display(); 
private: 
int hour;
int minute; 
}; 
Time::Time( int hour, int minute ) 
{ 
setTime( hour, minute); 
} 
void Time::setTime( int hour, int minute ) 
{ 
setHour( hour ); 
setMinute( minute ); 
} 
void Time::get( ) 
{ 
int hour, minute, second; 
cout << "Enter hour : " ; 
cin >> hour; 
cout << endl ;  
cout << "Enter minute : " ; 
cin >> minute; 
cout << endl ;
setTime(hour,minute); 
} 
void Time::setHour( int h ) 
{ 
hour = h; 
} 
void Time::setMinute( int m ) 
{ 
minute = m; 
} 
int Time::getHour ( ) const 
{ 
return hour; 
} 
int Time::getMinute () const 
{ 
return minute; 
} 
void Time::display() 
{ 
cout << setfill( '0' ) << setw( 2 ) << hour << ":" << setw( 2 ) 
<< minute; 
} 
const Time Time::operator+(const Time &other) { 
int hour = (*this).getHour() + other.getHour(); 
int min = (*this).getMinute() + other.getMinute(); 
if ( min > 60 ) 
{ 
min = min - 60; 
hour = hour + 1; 
} 
if ( hour > 24 ) 
{ 
hour = hour - 24; 
} 
return Time( hour, min); 
} 
int main()
{
  Time tm(12,3);
  tm.display();
  int a;
  cin >>a;
  return 0;
}

line 16 - 19 and 83 -85

Last edited on

Learn to indent.

const Time Time::operator+(const Time &other) ; in line 16 is a declaration

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class foo{
   //declarations go here
};

as you can see, it is obvious of which class the function is a member of, so there is no need to put `Time::' in the declaration.