}
function div()
{
$this->result = $this->fristnumb / $this->nextnumb;
echo $this->result;
}
}
$num1 = $_POST['num1'];
$num2 = $_POST['num2'];
$char = $_POST['char'];
switch ($char) {
case '+':
$add = new Calculator($num1, $num2);
$add->add();
break;
case '-':
$sub = new Calculator($num1, $num2);
$sub->sub();
break;
case '*':
$mul = new Calculator($num1, $num2);
$mul->mul();
break;
case '/':
$div = new Calculator($num1, $num2);
$div->div();
break;
default:
echo "输入有误";
break;
}
<form method="post">
<input type="number" name="number1">
<input type="text" name="operator">
<input type="number" name="number2">
<input type="submit" name="calculator" value="Calculate">
</form>
<?php
$calculator1 = new Calculator();
if (isset($_POST['calculator'])) {
$number1 = $_POST['number1'];
$number2 = $_POST['number2'];
$operator = $_POST["operator"];
if ($operator == "+") {
$calculator1->add($number1, $number2);
echo $calculator1->getResult();
} elseif ($operator == "-") {
$calculator1->sub($number1, $number2);
echo $calculator1->getResult();
} elseif ($operator == "/") {
$calculator1->div($number1, $number2);
echo $calculator1->getResult();
} elseif ($operator == "*") {
$calculator1->mul($number1, $number2);
echo $calculator1->getResult();
} else {
echo "Invalid operator";
}
}
?>
</body>
</html>
public function div($value)
{
return $this->answer /= (double) $value;
}
public function clear()
{
$this->answer = 0;
}
public function eq()
{
return $this->answer;
}
}
// Spl auto loader
require 'SplClassLoader.php';
$loader = new SplClassLoader(null, implode(DIRECTORY_SEPARATOR, array(__DIR__, '..', 'src')));
$loader->register();
// Calculator
$calc = new Calculator();
$calc->add(15);
// answer = 15
$calc->mul(3);
// answer = 45
$calc->div(9);
// answer = 5
echo $calc->eq();
// prints 5
echo "\n";
// Implement calculator chain
$chain = new \Chainnn\Chain($calc, array('add', 'sub', 'mul', 'div', '^clear', '$eq'));
echo $chain->clear()->add(100)->div(5)->sub(10)->mul(3)->eq();
<?php
require_once 'calc.php';
describe('calculator', function () {
$calc;
beforeEach(function () use(&$calc) {
$calc = new Calculator();
});
describe('adds', function () use(&$calc) {
it('positive numbers', function () use(&$calc) {
expect($calc->add(1, 2))->toBe(3);
});
it('negative numbers', function () use(&$calc) {
expect($calc->add(-4, -5))->toBe(-9);
});
it('with zero', function () use(&$calc) {
expect($calc->add(0, 10))->toBe(10);
});
});
describe('divides', function () use(&$calc) {
it('positive numbers', function () use(&$calc) {
expect($calc->div(8, 2))->toBe(4);
});
it('throws on division by zero', function () use(&$calc) {
expect(function () use(&$calc) {
$calc->div(1, 0);
})->toThrow();
});
});
});
