JS OOP編程

//父類
function BaseFun() {
    var hello = "HelloWorld";
    this.HelloPublic = "Hello--World";

    var privatefun = function () {
        alert("hellow");
    }

    this.publicfun = function () {
        var a = this.HelloPublic;
        alert("this is public funtion" + a);
    }
}

//子類
function  SubFun() {
    BaseFun.apply(this, arguments);// 建立繼承關系
    this.SubHello = function () {
        alert("sub ok");
    }
}

//動物基類
function  BaseAnimal() {
    this.Type = "Animal";
    this.Eat = function () {
        alert(this.Type + "會吃東西方法");
    }
    this.Walter = function () {
        alert(this.Type + "喝水");
    }
}

//豬子類
function  Pie() {
    //子類方法覆蓋父類方法
    this.Eat = function (arg) {
        alert(arg);
    }
}

//狗子類
function Dog() {

}
//prototype屬性，指定為該屬性的值，該構造器的實例對象自動繼承
Dog.prototype={
    eatfood:function () {
        alert("吃東西");
    },
    sleep:function () {
        alert("睡覺");
    }
};

     function  getFun() {
            var basef=new BaseFun();
            var a=basef.HelloPublic;

            basef.HelloPublic="我是父類";
            basef.publicfun();

            var sub=new SubFun();
            sub.HelloPublic="我是子類";
            sub.publicfun();


            var pie=new Pie();
            pie.Eat("吃東西");

            //建立繼承關系
            Pie.prototype=new BaseAnimal();
            var p=new Pie();
            p.Type="豬";
            p.Walter();

            var dog=new Dog();
            dog.sleep();
            dog.eatfood();
        }