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[1]悲剧，具体把多态用在数组上

有码有真相：

#include <iostream>
#include <map>
#include <string>
#include <memory>
using namespace std;


class AbstractEvent
{
public:
	virtual char* Event(char* apMsg)=0;
};
class AbstractMsgHandler
{
public:
	virtual void Handler(char* apAnswer)=0;
};
class AbstractEventPool
{
public:
	virtual void Register(AbstractEvent* apAbstractEvent)=0;
};
class MsgSender
{
public:
	MsgSender(AbstractEvent* apSubscribeEvent,AbstractMsgHandler* apMsgHandler):
	  m_pSubscribeEvent(apSubscribeEvent),m_pMsgHandler(apMsgHandler)
	  {

	  }
	void SendMsg(char* apMsg)
	{
		char* lpAnswer = m_pSubscribeEvent->Event(apMsg);
		m_pMsgHandler->Handler(lpAnswer);
	}
private:
	AbstractEvent* m_pSubscribeEvent;
	AbstractMsgHandler* m_pMsgHandler;
};
class ConcreteEvent:public AbstractEvent
{
public:
	char* Event(char* apMsg)
	{
		return apMsg;
	}
};

typedef map<int,AbstractEvent*> EventMap;

class ConcreteEventPool:public AbstractEventPool
{
public:
	void Register(const int& aEventEnum,AbstractEvent* apAbstractEvent)
	{
		EventMap::iterator lIter = m_EventMap.find(aEventEnum);
		if (m_EventMap.end() != lIter)
		{
			m_EventMap.insert(std::make_pair(aEventEnum,apAbstractEvent));
		}
	}
private:
	EventMap m_EventMap;
};


class ConcreteMsgHandler:public AbstractMsgHandler
{
	void Handler(char* apAnswer)
	{
		std::cout << apAnswer << std::endl;
	}
};
int main()
{
	std::auto_ptr<AbstractEvent> lpAbstractEvent(new ConcreteEvent());
	std::auto_ptr<AbstractMsgHandler> lpAbstractMsgHandler(new ConcreteMsgHandler());
	std::auto_ptr<MsgSender> lpMsgSender(new MsgSender(lpAbstractEvent.get(),lpAbstractMsgHandler.get()));
	char* lpMsg = "Hello World!";
	lpMsgSender->SendMsg(lpMsg);
	return 0;
}

oh,no，我怎么相处这样的代码。。。。。。

[2]Android必问的面试题

Android项目的开发流程。

Activity的启动模式有哪些，在项目中是如何应用的。

Button,ImageButton,ImageView的区别是什么，平时项目中是如何使用的。

如何管理Android的内存（工具），说一说在项目中的一些内存优化方案。

是否做过消息推送方面的内容，简单叙述一下。（可选）

是否做过自认为不错的动画效果，简单叙述一下。（可选）

[3]一个sql语句的基本用法

//xp创建指令
exec xp_cmdshell 'mkdir D:\\DB'
//如果系统存在此对象的数据库 删除
if exists(select * from sysdatabases where name = 'StuDB')
  drop database StuDB

//创建数据库StuDB
//数据库名字，文件路径，文件大小，文件最大空间，增长速度
create database StuDB
on
(
  name = 'StuDB_main_db',
  filename = 'D:\DB\StuDB_main.mdf',
  size = 10mb,
  maxsize = 20mb,
  filegrowth = 10%
)
log on
(
  name = 'StuDB_log_db',
  filename = 'D:\DB\StuDB_log.ldf',
  size = 10mb,
  maxsize = 20mb,
  filegrowth = 10%
)


use StuDB  
//如果系统存在此对象的表 删除
if exists(select * from sysobjects where name = 'student')
   drop table student
create table student
(
  sid int identity(10001001,1) primary key,
  sname varchar(40),
  age int,
  * varchar(20)
)

select * from student
//插入数据
insert into student values('张三',22,'男')


delete from student where sid = 10001005


insert into student values(10001006,'李四',22,'男')
insert into student values(10001006,'李四',22,'男')
set identity_insert student on
    
insert into student(sid,sname,age,*) values(10001006,'李四',22,'男')
insert into student(sid,sname,age,*) values(10001010,'李四',22,'男')
insert into student(sid,sname,age,*) values(10001011,'李四',22,'男')
//删除
delete from student where sid = 10001005
delete from student where sid = 10001006
delete from student where sid = 10001010
delete from student where sid = 10001011
delete from student where sid = 10001007
select * from student
//数据库基本用法