致命错误:在C语言中调用未定义的函数资产():\wamp\www\laravel-master\app\views\hello.php。

I wanted to learn laravel framework. I could install laravel in my webserver(Wamp) and i get some tutorial to learn it but when i tryed to add style to 'h1' tag in the hello.php file place in this path:("C:\wamp\www\laravel-master\app\views\hello.php") by asset() function, above mentioned error occurred. please help me to find out where the problem are. here is hello.php codes:I wanted to learn laravel framework. I could in