S4.LR1_1

//===========================================================
//===[ windowinput.h ]=======================================
//===========================================================
#ifndef WINDOWINPUT_H
#define WINDOWINPUT_H

#include <QWidget>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QGridLayout>

//===========================================================
class WindowInput : public QWidget
{
  Q_OBJECT
public:
  explicit WindowInput(QWidget *parent = 0);

  QLabel* lbl_1;
  QLineEdit* lEd_1;
  QPushButton* pBt_1;
  QPushButton* pBt_2;
  QGridLayout* grLay_1;
signals:

public slots:

};

#endif // WINDOWINPUT_H

//===========================================================
//===[ windowinput.cpp ]=====================================
//===========================================================
#include "windowinput.h"
#include "solution.h"

WindowInput::WindowInput(QWidget *parent) :
    QWidget(parent)
{
  lbl_1 = new QLabel("Значение переменной:");

  lEd_1 = new QLineEdit("0");
    lEd_1->setFixedWidth(40);
    lEd_1->setMaxLength(5);
    lEd_1->selectAll();

  pBt_1 = new QPushButton("&Calculate");
  pBt_2 = new QPushButton("&Quit");

  grLay_1 = new QGridLayout;
    grLay_1->setMargin(5);
    grLay_1->setSpacing(10);

  grLay_1->addWidget(lbl_1, 0, 0);
  grLay_1->addWidget(lEd_1, 0, 1);
  grLay_1->addWidget(pBt_1, 1, 0);
  grLay_1->addWidget(pBt_2, 1, 1);

  connect(pBt_2, SIGNAL(clicked()), SLOT(close()));

  setLayout(grLay_1);
}

//===========================================================
//===[ windowoutput.h ]======================================
//===========================================================
#ifndef WINDOWOUTPUT_H
#define WINDOWOUTPUT_H

#include <QWidget>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QGridLayout>

class WindowOutput : public QWidget
{
  Q_OBJECT
public:
  explicit WindowOutput(QWidget *parent = 0);

  QLabel* lbl_2;
  QLabel* lbl_3;
  QLabel* lbl_4;
  QLabel* lbl_5;
  QLabel* lbl_6;
  QPushButton* pBt_3;
  QPushButton* pBt_4;
  QGridLayout* grLay_2;
signals:

public slots:

};

#endif // WINDOWOUTPUT_H


//===========================================================
//===[ windowoutput.cpp ]====================================
//===========================================================
#include "windowinput.h"
#include "solution.h"

WindowInput::WindowInput(QWidget *parent) :
    QWidget(parent)
{
  lbl_1 = new QLabel("Значение переменной:");

  lEd_1 = new QLineEdit("0");
    lEd_1->setFixedWidth(40);
    lEd_1->setMaxLength(5);
    lEd_1->selectAll();

  pBt_1 = new QPushButton("&Calculate");
  pBt_2 = new QPushButton("&Quit");

  grLay_1 = new QGridLayout;
    grLay_1->setMargin(5);
    grLay_1->setSpacing(10);

  grLay_1->addWidget(lbl_1, 0, 0);
  grLay_1->addWidget(lEd_1, 0, 1);
  grLay_1->addWidget(pBt_1, 1, 0);
  grLay_1->addWidget(pBt_2, 1, 1);

  connect(pBt_2, SIGNAL(clicked()), SLOT(close()));

  setLayout(grLay_1);
}

//===========================================================
//===[ solution.h ]==========================================
//===========================================================
#ifndef SOLUTION_H
#define SOLUTION_H

#include <QObject>

class Solution : public QObject
{
  Q_OBJECT
private:
  double var_1;
  double res_1, res_2;
public:
  Solution();
public slots:
  void Run_1();
  void Run_2();
  void Print_1();
  void Print_2();
  void SetVal(QString);
signals:
  void ResOut_1(QString);
  void ResOut_2(QString);
};

#endif // SOLUTION_H

//===========================================================
//===[ solution.cpp ]========================================
//===========================================================
#include "solution.h"
#include <QDebug>
#include <math.h>

Solution::Solution() : QObject()
{
}

void Solution::SetVal(QString a)
{
  var_1 = a.toInt();
  qDebug() << var_1;
}

void Solution::Run_1()
{
  res_1 = ((var_1+2)/sqrt(2*var_1) - var_1/(sqrt(2*var_1)+2) + 2/(var_1 - sqrt(2*var_1))) * ((sqrt(var_1) - sqrt(2)) / (var_1+2));
  qDebug() << var_1;
  qDebug() << res_1;
}

void Solution::Run_2()
{
  res_2 = 1 / (sqrt(var_1) + sqrt(2));
  qDebug() << var_1;
  qDebug() << res_2;
}

void Solution::Print_1()
{
  emit ResOut_1(QString::number(res_1));
}

void Solution::Print_2()
{
  emit ResOut_2(QString::number(res_2));
}

//===========================================================
//===[ main.cpp ]============================================
//===========================================================
#include "solution.h"
#include "windowinput.h"
#include "windowoutput.h"
#include <QApplication>

int main(int argc, char *argv[])
{
  QApplication app(argc, argv);
  WindowInput window_1;
  WindowOutput window_2;
  Solution solution;

  window_1.setWindowTitle("Ввод значений");
  window_1.resize(150, 100);

  window_2.setWindowTitle("Результаты вычислений");
  window_2.resize(150, 100);

  QObject::connect(window_1.lEd_1, SIGNAL(textChanged(QString)),
                   &solution, SLOT(SetVal(QString)));
  //--кнопки--окон-----------------------------------
  QObject::connect(window_1.pBt_1, SIGNAL(clicked()),
                   &window_1, SLOT(hide()));
  QObject::connect(window_1.pBt_1, SIGNAL(clicked()),
                   &window_2, SLOT(show()));
  QObject::connect(window_1.pBt_1, SIGNAL(clicked()),
                   &solution, SLOT(Run_1()));
  QObject::connect(window_1.pBt_1, SIGNAL(clicked()),
                   &solution, SLOT(Run_2()));
  QObject::connect(window_1.pBt_1, SIGNAL(clicked()),
                   &solution, SLOT(Print_1()));
  QObject::connect(window_1.pBt_1, SIGNAL(clicked()),
                   &solution, SLOT(Print_2()));
  QObject::connect(window_2.pBt_3, SIGNAL(clicked()),
                   &window_2, SLOT(hide()));
  QObject::connect(window_2.pBt_3, SIGNAL(clicked()),
                   &window_1, SLOT(show()));
  QObject::connect(window_2.pBt_3, SIGNAL(clicked()),
                   window_1.lEd_1, SLOT(selectAll()));
  //--вывод--результатов-----------------------------
  QObject::connect(&solution, SIGNAL(ResOut_1(QString)),
                   window_2.lbl_4, SLOT(setText(QString)));
  QObject::connect(&solution, SIGNAL(ResOut_2(QString)),
                   window_2.lbl_5, SLOT(setText(QString)));

  window_1.show();

  return app.exec();
}