Buat Kalkulator dengan PHP

Kalkulator dengan PHP.

Kali ini kita akan belajar membuat aplikasi kalkulaor dengan menggunakan metode OOP dalam PHP. Tanpa banyak teori langsung saja kita praktek. Silahkan anda ketik kode dibwah ini ke dalam php editor anda.

<?php

class Matematika

{

  private $x;

  private $y;

  public function Tambah($x, $y)

  {

    $this->x = $x;

    $this->y = $y;

    $hasil = $this->x + $this->y;

    return $hasil;

  }

  public function Kali($x, $y)

  {

    $this->x = $x;

    $this->y = $y;

    $hasil = $this->x * $this->y;

    return $hasil;

  }

  public function Kurang($x, $y)

  {

    $this->x = $x;

    $this->y = $y;

    $hasil = $this->x - $this->y;

    return $hasil;

  }

  public function Bagi($x, $y)

  {

    $this->x = $x;

    $this->y = $y;

    $hasil = $this->x / $this->y;

    return $hasil;

  }

  public function TampilkanForm()

  {

    echo '<form method="POST">';

    echo '<input type="text" name="x"> &nbsp;';

    echo '<select name="operasi">

      <option value="tambah">+</option>

      <option value="kali">x</option>

      <option value="kurang">-</option>

      <option value="bagi">/</option>

    </select> &nbsp;';

    echo '<input type="text" name="y"> &nbsp;';

    echo '<label>=</label> &nbsp;';

    echo '<input type="submit" value="Hitung">';

    echo '</form>';

  }

}

$data = new Matematika();

$data->TampilkanForm();

if ($_POST) {

  $x = $_POST['x'];

  $y = $_POST['y'];

  if ($_POST['operasi'] == "tambah") {

    echo "Hasil ".$x." + ".$y." = ".$data->Tambah($x, $y)."<br /><br />";

  } elseif ($_POST['operasi'] == "kali") {

    echo "Hasil ".$x." x ".$y." = ".$data->Kali($x, $y)."<br /><br />";

  } elseif ($_POST['operasi'] == "kurang") {

    echo "Hasil ".$x." - ".$y." = ".$data->Kurang($x, $y)."<br /><br />";

  } elseif ($_POST['operasi'] == "bagi") {

    echo "Hasil ".$x." / ".$y." = ".$data->Bagi($x, $y)."<br /><br />";

  }

}

?>