//server.js

var http = require("http");

var Teacher = require("./teacher");

http.createServer(function(request, response){

    response.writeHead(200, {"Content-Type":"text/html; charset=uf-8"});

    if (request.url!=="/favicon.ico") {

        let teacher = new Teacher(1, 'gaoxiong', 24);

        teacher.job();

        response.end();

    }

}).listen(8000);

console.log('Server running at http://127.0.0.1:8000/');

//user.js

function User(id, name, age){

    this.id = id;

    this.name = name;

    this.age = age;

    this.job = function(){

        console.log('learning');

    }

}

module.exports = User;

//teacher.js

var User = require("./user");

function Teacher(id, name, age){

    User.apply(this, [id, name, age]);

    this.job = function(){

        console.log('teaching:'+this.name);

    }

}

module.exports = Teacher;