switch ($op) {
case '+':
$this->result = $array_num[0] + $array_num[1];
echo "result = " . $this->result . "</br>";
break;
case '/':
if ($array_num[1] == 0) {
die("除数不能为0！") . "</br>";
} else {
$this->result = (double) $array_num[0] / $array_num[1];
echo "result = " . $this->result . "</br>";
}
break;
case '*':
$this->result = $array_num[0] * $array_num[1];
echo "result = " . $this->result . "</br>";
break;
case '-':
$this->result = $array_num[0] - $array_num[1];
echo "result = " . $this->result . "</br>";
break;
default:
die("未知错误");
break;
}
}
}
$str_get = $_POST['num'];
$calculator1 = new calculator("{$str_get}");
$calculator1->option($calculator1->op);
