QT5-control-QSpinBox and QDoubleSpinBox (used to adjust integers and decimals through the control), qt5 -- qspinbox

QT5-control-QSpinBox and QDoubleSpinBox (used to adjust integers and decimals through the control), qt5 -- qspinbox

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>#include <QSpinBox>#include <QDoubleSpinBox>class MainWindow : public QMainWindow{    Q_OBJECTpublic:    MainWindow(QWidget *parent = 0);    ~MainWindow();    QSpinBox* spin[10];    QDoubleSpinBox* doublespin[10];};#endif // MAINWINDOW_H

#include "mainwindow.h"MainWindow::MainWindow(QWidget *parent)    : QMainWindow(parent){    this->resize(400,300);    this->centralWidget();    int xpos = 10 ;    int ypos = 30 ;    int val[] = {50,100,200};    double double_val[] = {50.5,127.32,171.342};    for(int i=0;i<3;i++)    {        spin[i] = new QSpinBox(this);        spin[i]->setMinimum(10);        spin[i]->setMaximum(300);        spin[i]->setValue(val[i]);        spin[i]->setGeometry(xpos,ypos,100,30);        spin[i]->setPrefix("$ ");        doublespin[i] = new QDoubleSpinBox(this);        doublespin[i]->setMinimum(10.0);        doublespin[i]->setMaximum(300.0);        doublespin[i]->setValue(double_val[i]);        doublespin[i]->setGeometry(xpos+110,ypos,100,30);        doublespin[i]->setSuffix(" mm");        ypos += 40 ;    }}MainWindow::~MainWindow(){}

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