<script src="angular.min.js"></script>
<script src="add_numbers_controller.js"></script>
<div ng-app="AddNumbersApp">
    <div ng-controller="AddNumbersController">
        <input ng-model="a" ng-keyup="AddNumbers()">
        <input ng-model="b" ng-keyup="AddNumbers()">
        <h1>{{ sum }}</h1>
    </div>
</div>
