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<!DOCTYPE html>
<html ng-app="CalApp">
<head>
  <meta charset="utf-8">
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.5/angular.min.js"></script>
</head>
<body>
  
<form class="span5 form-inline" style="margin-top:20px;" ng-controller="CalCtrl">
    <div class="alert alert-info">
        <input type="number" class="input-small" ng-model="num1">
        <span>*</span>
        <input type="number" class="input-small"ng-model="num2" disabled>
        <span>=</span>
        {{ num1 * num2}}
    </div>
</form>
  
 
  
  
<br><br><br>
<hr>
  
  
  <div class="well span6" ng-controller="PersonCtrl">
        <label>Name:</label>
        <input type="text" ng-model="name" placeholder="Enter a name here">
        <br>
        <label>Age:</label>
        <input type="text" ng-model="age" placeholder="Enter a number here">
        <hr>
        <h1>{{ name }}</h1>
        <h2>{{ age }}</h2>
    </div>
  
</body>
</html>
 
var calApp = angular.module('CalApp', []);
​
calApp.controller('CalCtrl', function($scope){
    $scope.num1 = 0;
    $scope.num2 = 5;
});
​
​
calApp.controller('PersonCtrl', function($scope){
    $scope.name = '男丁格爾';
    $scope.age = 18;
  
  
  
  $scope.$watch('name', function(){
        console.log($scope.name);
    });
 
    $scope.$watch('age', function(){
        if($scope.age < 18){
            console.error('可能是謊報年齡');
        }
    });
});
​
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