Error: Failed to lookup view "index" in views directory "/views"
   at EventEmitter.app.render (E:\projects\Imooc\node_modules\express\lib\application.js:555:17)
   at ServerResponse.res.render (E:\projects\Imooc\node_modules\express\lib\response.js:938:7)
   at E:\projects\Imooc\app.js:14:6
   at Layer.handle [as handle_request] (E:\projects\Imooc\node_modules\express\lib\router\layer.js:82:5)
   at next (E:\projects\Imooc\node_modules\express\lib\router\route.js:110:13)
   at Route.dispatch (E:\projects\Imooc\node_modules\express\lib\router\route.js:91:3)
   at Layer.handle [as handle_request] (E:\projects\Imooc\node_modules\express\lib\router\layer.js:82:5)
   at E:\projects\Imooc\node_modules\express\lib\router\index.js:267:22
   at Function.proto.process_params (E:\projects\Imooc\node_modules\express\lib\router\index.js:321:12)
   at next (E:\projects\Imooc\node_modules\express\lib\router\index.js:261:10)

var express = require('express');

var port = process.env.PORT||3000;

var app = express();

app.set('views','/views');

app.set('view engine','jade');

app.set('port',3000);

app.listen(port,function(){

console.log('Imooc started on port '+port);

})

app.get('/',function(req,res){

res.render('index',{title:'Imooc首页'});

//res.send('Hello World')

})