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<?php

class Calculator {
    public $none;
    public $ntwo;
    public $operator;

    function __construct($none, $ntwo, $operator) {
        $this->none = $none;
        $this->ntwo = $ntwo;
        $this->operator = $operator;
    }
    // function calcu() {
    //     if ($this->operator === 'sum') {
    //         return $this->none + $this->ntwo;
    //     } elseif ($this->operator === 'sub') {
    //         return $this->none - $this->ntwo;
    //     } elseif ($this->operator === 'into') {
    //         return $this->none * $this->ntwo;
    //     } elseif ($this->operator === 'Devition') {
    //         if ($this->ntwo != 0) {
    //             return $this->none / $this->ntwo;
    //         } else {
    //             return "Cannot divide by zero";
    //         }
    //     } else {
    //         return "Invalid operator";
    //     }
    // }
    function calculate() {
        switch ($this->operator) {
            case 'sum':
                return $this->none + $this->ntwo ;
            case 'sub':
                return $this->none - $this->ntwo ;
            case 'into':
                return $this->none * $this->ntwo;
            case 'Devition':
                if ($this->ntwo != 0) {
                    return $this->none / $this->ntwo;
                } else {
                    return "Cannot / by zero";
                }
            default:
                return "Invalid operator";
        }
    }
}

@$none = $_POST['none'];
@$ntwo = $_POST['ntwo'];
@$operator = $_POST['operator'];
@$result = new Calculator($none, $ntwo, $operator);

?>





<!doctype html>
<html lang="en">
<head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- Bootstrap CSS -->
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" >
    <title>Calculator | Using OOP</title>
</head>
<body>
    <div class="w-75 m-auto mt-5">
        <form action="./calculator.php" method="post">
            <div class="container">
            <div class="row">
                <div class="col">
                    <input type="number" class="form-control form-control-sm" name="none" placeholder="Number One" Required value="{{ old('none', 'default value') }}">
                </div>
                <div class="col">
                    <input type="number" class="form-control form-control-sm" name="ntwo" placeholder="Number Two" Required value="{{ old('ntwo', 'default value') }}">
                </div>
                <div class="col">
                    <select class="form-select form-select-sm mb-3" aria-label=".form-select-lg example" name="operator">
                        <option disabled selected>Select Operator</option>
                        <option value="sum">+</option>
                        <option value="sub">-</option>
                        <option value="into">*</option>
                        <option value="Devition">/</option>
                    </select>
                </div>
                <div class="col">
                    <button type="submit" class="btn btn-primary btn-sm">Calculator</button>
                </div>
            </div>
        </div>
        </form>
        <h2>Result : <?php echo $result->calculate() ?> </h2>
    </div>


    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js" ></script>
</body>
</html>