php专区

	class Person

	{

		private $name;

		private $sex;

		private $age;


		function __construct($name="",$sex="男",$age=23)

		{

			$this->name=$name;

			$this->sex=$sex;

			$this->age=$age;

		}

		function say()

		{

			echo "我的名字  ".$this->name."，性别  ".$this->sex."，年龄  ".$this->age."
";

		}

		function run()

		{

			echo $this->name."正在走路
";

		}

	}


	class Student extends Person 

	{

		var $school;

		function study()

		{

			echo $this->name."正在".$this->school."学习
";

		}

	}

	class Teacher extends Student 

	{

		var $wage;

		function teaching()

		{

			echo  $this->sex."正在".$this->school."教学，每个月工资为".$this->wage."
";

		}

	}

	$teacher1=new Teacher("张三","男",40);

	$teacher1->school="沈阳工学院";

	$teacher1->wage=3000;


	$teacher1->say();

	$teacher1->run();

	$teacher1->teaching();

?>