function Person(name, age, sex) {

this.name = name;

this.age = age;

this.sex = sex;

this.color=["red","blue","green"];

}

Person.prototype.sayHello=function(){ console.log("hello word!")};

function Man(name,age,sex,job){

Person.call(this,name,age,sex);// 第二次

this.job=job;

}

Man.prototype=new Person();//第一次

var instance=new Man("张三",20,"男","农民");

instance.color.push("black");

console.log(instance.color);//["red", "blue", "green", "black"]

console.log(instance.job);//农民

console.log(instance.sayHello);//hello word!

var instance2=new Man("张三",20,"男","地主");

console.log(instance2.color); //["red", "blue", "green"]

console.log(instance2.job);//地主

console.log(instance2.sayHello);//hello word!

Man.prototype=new Person();

//寄生组合式继承

    function inheritPrototype(child,parent){

        var prototype=Object(parent.prototype);// 第一步：创建一个变量接收父类原型对象

        prototype.constructor=child;// 第二步：原型对象构造指向子类

        child.prototype=prototype;// 第三步：用父类副本的原型对象重写子类原型对象

    }

    //基类

    function Person(name, age, sex) {

        this.name = name;

        this.age = age;

        this.sex = sex;

        this.color=["red","blue","green"];

    }

    Person.prototype.sayHello=function(){ console.log("hello word!")};

    //子类

    function Man(name,age,sex,job){

        Person.call(this,name,age,sex);//继承属性

        this.job=job;

    }

    inheritPrototype(Man,Person);// 继承原型方法

    var instance=new Man("张三",20,"男","农民");

    instance.color.push("black");// 数组添加一个元素

    console.log(instance.color);//["red", "blue", "green", "black"]

    console.log(instance.job);//农民

    console.log(instance.sayHello);//hello word!

    var instance2=new Man("张三",20,"男","地主");

    console.log(instance2.color); //["red", "blue", "green"]

    console.log(instance2.job);//地主

    console.log(instance2.sayHello);//hello word!