1,属性继承

继承:子级继承父级的一些属性或者方法

call apply:专门用来实现属性的继承

function Person(name,age,sex){

this.name = name;

this.age = age;

this.sex = sex;

}

Person.prototype.eat = function(){

console.log("正在吃饭")

}

Person.prototype.sleep = function(){

console.log("正在睡觉")

}

function Man(larynx,beard,name,age,sex,){

Person.call(this,name,age,sex)

this.larynx = larynx;

this.beard = beard;

}

Man.prototype.work = function(){

console.log('111')

}

var songlei = new Man(10,20);

console.log(songlei);