text: //
  //  ClassTest.h
  //  KVOTest
  //
  //  Created by Mekor on 16/9/6.
  //  Copyright © 2016年 李小争. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  @interface ClassTest : NSObject
  {
      int x;
      int y;
      int z;
  }
  
  @property (nonatomic, assign) int x;
  @property (nonatomic, assign) int y;
  @property (nonatomic, assign) int z;
  @end
  