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<?php
//定義接口
interface Calc{
public function getValue($num1,$num2);
}
//創(chuàng)建實(shí)現(xiàn)接口的實(shí)體類
class Add implements Calc{
public function getValue($num1,$num2) {
return $num1 + $num2;
}
}
class Sub implements Calc{
public function getValue($num1,$num2) {
return $num1 - $num2;
}
}
class Mul implements Calc{
public function getValue($num1,$num2) {
return $num1 * $num2;
}
}
class Div implements Calc{
public function getValue($num1,$num2) {
try {
if($num2 == 0) {
throw new Exception('除數(shù)不能為0');
} else {
return $num1/$num2;
}
} catch (Exception $e) {
echo "錯(cuò)誤信息:" . $e->getMessage();
}
}
}
//創(chuàng)建一個(gè)工廠,生成基于給定信息的實(shí)體類的對(duì)象
class Factory{
public static function createObj($operate) {
switch ($operate) {
case '+':
return new Add();
break;
case '-':
return new Sub();
break;
case '*':
return new Mul();
break;
case '/':
return new Div();
break;
}
}
}
$test = Factory::createObj('-');
echo $test->getValue(1,4);
?>
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