<?php require 'calculator.php'; $obj = new Calculator(); if (isset($_POST['btn'])) { $first_number = $_POST['first_number']; $last_number = $_POST['last_number']; $btn = $_POST['btn']; if ($btn == '+') { $result = $obj->addition($first_number, $last_number); } else { if ($btn == '-') { $result = $obj->subtraction($first_number, $last_number); } else { if ($btn == '*') { $result = $obj->multiplication($first_number, $last_number); } else { if ($btn == '/') { $result = $obj->division($first_number, $last_number); } else { if ($btn == '%') { $result = $obj->reminder($first_number, $last_number); } } } } } } ?> <html> <head>
<div class="btn-group"> <button class="btn btn-default" type="submit" name="btn" value="+">+</button> <button class="btn btn-default" type="submit" name="btn" value="-">-</button> <button class="btn btn-default" type="submit" name="btn" value="*">*</button> <button class="btn btn-default" type="submit" name="btn" value="/">/</button> </div> </td> </tr> <!--Checks whether buttons have been clicked and calls the function according to btn clicked--> <?php $obj = new Calculator(); if (isset($_POST['btn'])) { $first_number = $_POST['first_number']; $second_number = $_POST['second_number']; if ($_POST['btn'] == '+') { $result = $obj->addition($first_number, $second_number); } if ($_POST['btn'] == '-') { $result = $obj->subtraction($first_number, $second_number); } if ($_POST['btn'] == '*') { $result = $obj->multiply($first_number, $second_number); } if ($_POST['btn'] == '/') { $result = $obj->division($first_number, $second_number); } // if($first_number==0 or $second_number==0){ // $result= $obj->nothing(); // } } ?>