Thinkster.io Angularjs教程第3章 - 连接到Firebase的问题

我正在学习本教程,构建一个与firebase数据库连接的angularjs应用程序.我坚持第3章,我的应用程序应该使它初始连接到数据库.我有点觉得问题摆在我面前,因为我的命令提示符和jshint告诉我:

Running "jshint:all" (jshint) task

app\scripts\controllers\posts.js
  line 0   col 0  Bad option: 'app'.
  line 8   col 1  'app' is not defined.

app\scripts\services\post.js
  line 0   col 0  Bad option: 'app'.
  line 2   col 1  'app' is not defined.

6 problems

Warning: Task "jshint:all" failed. Use --force to continue.

Aborted due to warnings.

我的控制台给了我:

>Uncaught ReferenceError: app is not defined                      post.js
>Error: [$injector:unpr] Unknown provider: PostProvider <- Post
http://errors.angularjs.org/1.2.16/$injector/unpr?p0=PostProvider%20%3C-%20Post at http://localhost:9000/bower_components/angular/angular.js:78:12
at http://localhost:9000/bower_components/angular/angular.js:3705:19
at Object.getService [as get] (http://localhost:9000/bower_components/angular/angular.js:3832:39)
at http://localhost:9000/bower_components/angular/angular.js:3710:45
at getService (http://localhost:9000/bower_components/angular/angular.js:3832:39)
at invoke (http://localhost:9000/bower_components/angular/angular.js:3859:13)
at Object.instantiate (http://localhost:9000/bower_components/angular/angular.js:3880:23)
at http://localhost:9000/bower_components/angular/angular.js:7134:28
at link (http://localhost:9000/bower_components/angular-route/angular-route.js:913:26)
at nodeLinkFn (http://localhost:9000/bower_components/angular/angular.js:6579:13) 

为什么我的其他js文件看不到我的'app'全局声明？

(apps.js)

var app = angular.module('angNewsApp', [
'ngAnimate',
'ngCookies',
'ngResource',
'ngRoute',
'ngSanitize',
'ngTouch'
])

(post.js)

'use strict';
app.factory('Post', function ($resource){
return $resource('https://sizzling-fire-1990.firebaseio.com/posts/:id.json');
});

**从教程中复制所有文件内容