Edit in JSFiddle

var app = angular.module('test',[]);

app.controller("CtrlA", function($scope) {
      
   
});

app.controller("CtrlB", function($scope) {
      
   
});

app.controller("CtrlC", function($scope) {
      
    
});


<div ng-app="test" ng-init="mesaj='test'">
    
    <input type="text" ng-model="mesaj">
    
  <div ng-controller="CtrlA">
       <h1>{{mesaj}}</h1>
  </div>
    
  <div ng-controller="CtrlB">
       <h1>{{mesaj}}</h1>
  </div>
    
  <div ng-controller="CtrlC">
       <h1>{{mesaj}}</h1>
  </div>
    
</div>