Qt Creator C++: Storing lineEdit inputs in array - c++

Question

This might come off as a very stupid question, but I have to write a very simple program, consisting of a line edit and push button.
This program has to be able to take inputs(numbers) from the user in the line edit area and every time the push button is pressed, store the number values within an array of size 10.
I have some experience with C++ but am just generally very confused with the GUI aspects of Qt. The GUI stuff is just way over my head so I apologize again if this is trivial! But if anyone could help me figure out how to do this you would be the coolest.
Thanks!

Answer 1

Things need to do
set a button and a lineedit either in ui or in constructor of mywindows.
set validator for int.
declare a slot for button, to pass the int in lineEdit to your data structure.
fixed array is not enough to store all the user input, you need to think about whether you need is a list, a dynamic array, a fixed array of stack or queue.
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QList>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
void on_pushButton_clicked();
private:
Ui::MainWindow *ui;
QList<int> m_list;
};
#endif // MAINWINDOW_H
mainwindows.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->lineEdit->setValidator(new QIntValidator(0, 9999, this));
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_pushButton_clicked()
{
m_list.append(ui->lineEdit->displayText().toInt());
qDebug() << m_list;
}

Answer 2

Put lineEdit and button on form in Qt Designer or create it by yourself:
Create slot in header:
private slots:
void mySlot();
//do connection in dialog's constructor
connect(ui->pushButton, SIGNAL(clicked()), this, SLOT(mySlot()));
//Write slot
void Dialog::mySlot()
{
QString str = ui->lineEdit->text()
//now str contains all your text you can put it in different arrays.
}
text() return QString, but if you sure that it is double, then call toDouble() method
QString str = ui->lineEdit->text().replace(",",".")
double var = str.toDouble();
Moreover you can set QDoubleValidator to lineEdit and user can input only double in this lineEdit. Search in web what validator is and use setValidator() method to set it to lineEdit.