Code for Dinner class in "An Introduction to Categories in Objective-C."

Dinner.h

//Dinner.h
#import <Foundation/Foundation.h>

@interface Dinner: NSObject

  @property (nonatomic, strong) NSString *appetizer;
  @property (nonatomic, strong) NSString *mainDish;
  @property (nonatomic, strong) NSString *dessert;
  @property (nonatomic, strong) NSArray *ingredientsForAppetizer;
  @property (nonatomic, strong) NSArray *ingredientsForMainDish;
  @property (nonatomic, strong) NSArray *ingredientsForDesert;
  @property (strong)NSUInteger cookTimeInMinutes;
  @property (strong)NSUInteger numberOfForks;
  @property (strong)NSUInteger numberOfPlates;
  @property (strong)NSUInteger numberOfSpoons;
  @property (strong)NSUInteger numberOfNapkins;
  @property (strong)NSUInteger numberOfWaterGlasses;

  - (void)prepareAppetizer;
  - (void)cookMainDish;
  - (void)prepareDesert;
  - (void)setTable;
  
@end