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

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow) {
  ui->setupUi(this);
  //设置TAB顺序
  setTabOrder(ui->equal, ui->x0);
  setTabOrder(ui->x0, ui->x1);
  setTabOrder(ui->x1, ui->w0);
  setTabOrder(ui->w0, ui->w1);
  setTabOrder(ui->w1, ui->b);
  setTabOrder(ui->b, ui->equal);
}

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

void MainWindow::on_equal_clicked() {
  double num = ui->x0->value() * ui->w0->value() +
               ui->x1->value() * ui->w1->value() + ui->b->value();

  qDebug() << num;

  num = sigmoid(num);

  ui->result->setText(QString::number(num, 'f', 16));
  ui->list->addItem("f(" + QString::number(ui->x0->value(), 'f', 2) + "," +
                    QString::number(ui->x1->value(), 'f', 2) +
                    ")=" + QString::number(num, 'f', 2));
}

double MainWindow::sigmoid(double x) { return 1 / (1 + exp(-x)); }

void MainWindow::on_action_triggered() { ui->list->clear(); }