/**

* Created by liufengkai on 16/6/26.

*/

function Student(props) {

this.name = props.name;

}

Student.prototype.hello = function () {

console.log(this.name + " is running!!!");

};

function PrimaryStudent(props) {

Student.call(this, props);

this.grade = props.grade || 1;

}

function F() {

}

F.prototype = Student.prototype;

PrimaryStudent.prototype = new F();

PrimaryStudent.prototype.constructor = PrimaryStudent;

PrimaryStudent.getGrade = function () {

return this.grade;

};

function inherits(Child, Parent) {

var F = function () {

};

F.prototype = Parent.prototype;

Child.prototype = new F();

Child.prototype.constructor = Child;

}

var smallMing = new PrimaryStudent({name: 'xiaoming', grade: 222});

smallMing.hello();

console.log(smallMing.name);