1-laboratoriya ishi. Kalkulyator yaratish I. Masalaning qo’yilishi

Ishni bajarish tartibi:

1. 
   Qt Creator muhitini ishga tushirish
   

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Заголовочные oyna

7. Dastur kodi

5. 
   #include "mainwindow.h"
   
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   #include "ui_mainwindow.h"
   
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   #include "math.h"
   
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   double num_first;
   
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    MainWindow::MainWindow(QWidget *parent) :
    
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    QMainWindow(parent),
    
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    ui(new Ui::MainWindow)
    
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    {
    
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    ui->setupUi(this);
    
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    connect(ui->pushButton_0, SIGNAL(clicked()), this, SLOT(digits_numbers()));
    
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    connect(ui->pushButton_1, SIGNAL(clicked()), this, SLOT(digits_numbers()));
    
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    connect(ui->pushButton_2, SIGNAL(clicked()), this, SLOT(digits_numbers()));
    
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    connect(ui->pushButton_3, SIGNAL(clicked()), this, SLOT(digits_numbers()));
    
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    connect(ui->pushButton_4, SIGNAL(clicked()), this, SLOT(digits_numbers()));
    
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    connect(ui->pushButton_5, SIGNAL(clicked()), this, SLOT(digits_numbers()));
    
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    connect(ui->pushButton_6, SIGNAL(clicked()), this, SLOT(digits_numbers()));
    
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    connect(ui->pushButton_7, SIGNAL(clicked()), this, SLOT(digits_numbers()));
    
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    connect(ui->pushButton_8, SIGNAL(clicked()), this, SLOT(digits_numbers()));
    
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    connect(ui->pushButton_9, SIGNAL(clicked()), this, SLOT(digits_numbers()));
    
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    connect(ui->pushButton_butun, SIGNAL(clicked()), this, SLOT(operations()));
    
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    connect(ui->pushButton_kasr, SIGNAL(clicked()), this, SLOT(operations()));
    
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    connect(ui->pushButton_yigindi, SIGNAL(clicked()), this, SLOT(math_operations()));
    
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    connect(ui->pushButton_kopaytma, SIGNAL(clicked()), this, SLOT(math_operations()));
    
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    connect(ui->pushButton_ayrma, SIGNAL(clicked()), this, SLOT(math_operations()));
    
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    connect(ui->pushButton_bolinma, SIGNAL(clicked()), this, SLOT(math_operations()));
    
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    ui->pushButton_kopaytma->setCheckable(true);
    
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    ui->pushButton_bolinma->setCheckable(true);
    
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    ui->pushButton_yigindi->setCheckable(true);
    
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    ui->pushButton_ayrma->setCheckable(true);
    
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    }
    
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    MainWindow::~MainWindow()
    
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    {
    
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    delete ui;
    
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    }
    
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    void MainWindow :: digits_numbers()
    
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    {
    
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    QPushButton *button = (QPushButton*)sender();
    
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    double all_numbers;
    
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    QString new_label;
    
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    if(ui->results_show->text().contains(".")&& button->text()=="0"){
    
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    new_label = ui->results_show->text() + button->text();
    
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    } else {
    
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    all_numbers = (ui->results_show->text()+button->text()).toDouble();
    
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    new_label = QString::number(all_numbers, 'g', 15);
    
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    }
    
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    ui->results_show->setText(new_label);
    
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    }
    
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    void MainWindow::operations()
    
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    {
    
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    QPushButton *button = (QPushButton*)sender();
    
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    double all_numbers;
    
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    QString new_label;
    
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    if (button->text()== "+/-"){
    
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    all_numbers = (ui->results_show->text()).toDouble();
    
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    all_numbers = all_numbers * -1;
    
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    new_label= QString :: number (all_numbers, 'g', 15);
    
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    ui->results_show->setText(new_label);
    
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    }
    
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    else if (button->text()== "%"){
    
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    all_numbers = (ui->results_show->text()).toDouble();
    
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    all_numbers = all_numbers * 0.01;
    
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    new_label= QString :: number (all_numbers, 'g', 15);
    
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    ui->results_show->setText(new_label);
    
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    }
    
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    }
    
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    void MainWindow::math_operations()
    
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    {
    
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    QPushButton *button = (QPushButton*)sender();
    
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    num_first = ui->results_show->text().toDouble();
    
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    ui->results_show->setText("");
    
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    button->setChecked(true);
    
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    }
    
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    void MainWindow::on_pushButton_AC_clicked()
    
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    {
    
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    ui->pushButton_kopaytma->setChecked(false);
    
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    ui->pushButton_bolinma->setChecked(false);
    
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    ui->pushButton_yigindi->setChecked(false);
    
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    ui->pushButton_ayrma->setChecked(false);
    
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    ui->results_show->setText("0");
    
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    }
    
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     {
     
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     if (ui->pushButton_tenglik->isChecked())
     
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     else if (num_second==0){
     
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     ui->results_show->setText("0");
     
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     } else {
     
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     labelNumber=num_first/num_second;
     
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     new_label= QString::number(labelNumber, 'g', 15);
     
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     ui->results_show->setText(new_label);
     
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     }
     
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     ui->pushButton_tenglik->setChecked(false);
     
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     }
     
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     if else (ui->pushButton_p->isChecked()) {
     
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     labelNumber=num_first + num_second;
     
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     new_label= QString::number(labelNumber, 'g', 15);
     
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     ui->results_show->setText(new_label);
     
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     ui->pushButton_p->setChecked(false);
     
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     }
     
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     if else (ui->pushButton_m->isChecked()) {
     
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     labelNumber=num_first - num_second;
     
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     new_label= QString::number(labelNumber, 'g', 15);
     
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     ui->results_show->setText(new_label);
     
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     ui->pushButton_m->setChecked(false);
     
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     }
     
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     }
     
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     void MainWindow::on_pushButton_tenglik_clicked()
     
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     {
     
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     if(!(ui->results_show->text().contains('.')))
     
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     ui->results_show->setText(ui->results_show->text()+".");
     
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     }
     
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     void MainWindow::on_pushButton_kopaytma_clicked()
     
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     {
     
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     double labelNumber, num_second;
     
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     QString new_label;
     
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     num_second = ui->results_show->text().toDouble();
     
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     if (ui->pushButton_kopaytma->isChecked()) {
     
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     labelNumber=num_first*num_second;
     
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     new_label= QString::number(labelNumber, 'g', 15);
     
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     ui->results_show->setText(new_label);
     
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     ui->pushButton_kopaytma->setChecked(false);
     
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     }
     
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     Xulosa
     

Men bu kalkulyatorni yaratish jarayonida label va pushButton asosoy foydalanganlarim shular bo’ldi undan tashqari ayrim kutubxonalardan ham foydalandim qulayroq yani yaxshiroq ishlashi uchun . Kalkulyator yaratishdan maqsadim darslar davomida olgan bilimlarimdan maqsadli va samarali foydalanish .

6. Foydalanilgan adabiyotlar va manbalar

1. 
   https://doc.qt.io/qt-5/qtpdf-index.html
   
2. 
   https://www.google.com/search?q=Qt+pdf&oq=Qt+pdf+&aqs=chrome..69i57j0l9.10645j0j15&sourceid=chrome&ie=UTF-8
   
3. 
   https:// code-live.ru/post/cpp-classes/
   
4. 
   ziyonet kutubxonasi