QT GUI Toolkit: beginer

[jpenguin]

So I am learning QT. But I can't seem to ge past 2 errors that seem to make no sense to me, "error "ui" was not declared in this scope". what get me is that I have the same thing on the next line, but no error...

simplecalc.cpp

#include <QtGui> 
 #include <QMessageBox>  
#include "simplecalc.h"   
//using namespace UI; 
simplecalc::simplecalc(QWidget *parent)     : QDialog(parent)
 {
       ui.setupUi(this);     //error
       connect( ui.calc, SIGNAL( clicked() ), this, SLOT( doSomething() ) );
       connect( ui.pushButton_quit, SIGNAL( clicked() ), this, SLOT( quit() ) );
       connect( ui.pushButton_about, SIGNAL( clicked() ), this, SLOT( about() ) );  
}
 
   void simplecalc::doSomething()
{     
            double value1, value2;
     char func;
 
      value1 = ui.num1->value();        //error
    //value1 = ui.num1->value();
     value2 = ui.num2->value();
     func = ui.sign->currentText();
 
      if(func=='x')
         ui.ans->settext() = value1 * value2;
     else if(func=='÷')
         ui.ans->settext(value1 / value2);
     else if(func=='-')
         ui.ans->settext(value1 - value2);
     else if(func=='+') 
        ui.ans->settext(value1 + value2);
     //ans->settext() = value1 func value2; }
 
void simplecalc::about()  
{
     QMessageBox::information(this, tr("About\n\n"),
                    tr("This is a simple calculator program created by Josh Dye.\n")); }

simplecalc.h

#ifndef SIMPLECALC_H
#define SIMPLECALC_H
 
#include "ui_SimpleCalc.h"
 
 
class simplecalc : public QDialog
{
    Q_OBJECT
 
public:
    simplecalc(QWidget *parent = 0);
 
public slots:
    void doSomething();
    void about();
 
};
#endif

[Laharl]

There's nothing the second time because undefined references are only flagged once/function. The issue here is that you never say what 'ui' is. If it's supposed to be the namespace UI, you don't need it there, as long as you uncomment the using directive. If it's some kind of object, you need to create it.

[jpenguin]

I got help on another forum

:closed: