Simplex_method_main

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>
#include <math.h>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_2_clicked()
{
    exit(0);
}

void MainWindow::on_pushButton_clicked()
{
    int row = ui->lineEdit->text().toInt();
    int column = ui->lineEdit_2->text().toInt();


    //MAIN ELEMENT CALCULATION      work!
    ui->tableWidgetResult->item(row,column)->setText(QString::number((
                pow((ui->tableWidget->item(row,column)->text().toDouble()),-1))));


    //MAIN COLUMN CALCULATION       work!
    int iN=0;
    while (iN<6) {
        if (iN!=row) {
            ui->tableWidgetResult->item(iN,column)->setText(QString::number(
                        pow(((ui->tableWidget->item(iN,column)->text().toDouble())*(-1)),-1)));
        }
        iN++;
    }


    //MAIN ROW CALCULATION      work!
    int jN=0;
    while (jN<5) {
        if (jN!=column) {
            ui->tableWidgetResult->item(row,jN)->setText(QString::number(
                        pow((ui->tableWidget->item(column,jN)->text().toDouble()),-1)));
        }
        jN++;
    }


    //OTHER ELEMENTS        work!
    int iM;
    int jM;
    for (iM=0; iM<6; iM++) {    //row
        for (jM=0; jM<5; jM++) {    //columns
            if (iM!=row && jM!=column) {
                ui->tableWidgetResult->item(iM,jM)->setText(QString::number(
                            ( (ui->tableWidget->item(iM,jM)->text().toDouble()) -
                              ((ui->tableWidget->item(iM,column)->text().toDouble()) *
                              (ui->tableWidget->item(row,jM)->text().toDouble()) /
                              (ui->tableWidget->item(row,column)->text().toDouble())) ) ) );
            }
        }
    }

}