一、有一个账号类：Account如下

#import

typedef struct
{
int year;
int month;
int day;
int hour;
int minute;
int second;
} registerDate ;

@interface Account : NSObject
@property(nonatomic,retain)NSString *userName;
@property(nonatomic,retain)NSString *password;
@property(nonatomic,assign)registerDate date;
@end

#import “Account.h”

@implementation Account

• (void)dealloc
  {
  [_userName release];
  [_password release];
  NSLog(@“账号挂了。。。”);
  [super dealloc];
  }
  @end

二、有一个作者类：User如下

#import
#import “Account.h”
typedef struct
{
int year;
int month;
int day;
int hour;
int minute;
int second;