javascript原型和继承

function Person(name){
    this.name=name;
}
Person.prototype.eat=function(){
    return "吃饭";
}

function Student(name,sex){
    Person.apply(this,[name]);
    this.sex=sex;
}
Student.prototype=Object.create(Person.prototype);
Student.prototype.study=function(){
    return "学习";
}

var student=new Student("小明","男");
console.log(student.name);
console.log(student.sex);
console.log(student.eat());
console.log(student.study());