text: //
  //  NSNumber+additions.h
  //  FuShuo
  //
  //  Created by nonstriater on 14-2-8.
  //  Copyright (c) 2014年 xiaoran. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  @interface NSNumber (additions)
  
  - (NSString *)fileSize;
  
  @end
  