按照课上老师讲的我自己写了一遍却报错了，无法运行
<!DOCTYPE html>
<html ng-app>
<head>
<meta charset="UTF-8">
<title>Simple app</title>
<script src="angular.js"></script>
</head>
<body>
<div ng-controller="HelloAngular">
<p>{{greeting.text}},Angular</p>
</div>
<script type="text/javaScript" >
function HelloAngular($scope){
$scope.greeting={text:'Hello'};
}
</script>
</body>
</html>
为什么我写的代码无法运行成功呢
