Trying to get property of non-object in laravel

i have following code

in controller

public function ViewPost($id)
    {
         $viewpost= Post::find($id);
          return view('Guest.viewpost', ['viewpost'=>$viewpost]);
    }

in view

@foreach($viewpost as $val)

    <br>
    Post title=
    <a href="viewpost/{{$val->id}}" >{{$val->post_title}}</a>
  <br>
    Post content={{$val->post_content}}
    <br>  <br>
    Featured Image=<img src="{{$val->featured_image}}" height="150" width="150">
  @endforeach

but above code thow an error Trying to get property of non-object.so i tried following way

$val['post_title'];

the above code wont throw an error nor displaying output.

if i print in controller it display output but same in view if i print it give error

print_r($viewpost);

I am using laravel 5.1.Can any one tell us what i am doing wrong ?.Thank you.

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