text: //
  //  Memory.h
  //  L8_Calculator2
  //
  //  Created by jansaharju on 25/01/14.
  //  Copyright (c) 2014 m0000892. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  @protocol Memory <NSObject>
  
  - (void)addToMemory;
  - (void)subtractFromMemory;
  - (void)clearMemory;
  - (NSNumber *)memorize;
  
  @end
  