在STL列表（vector）中插入不同类型的对象（指针）

最近在做的东西里有个要求就是最好能把不同类型的对象存在一个列表里，而且这些类型有个共同点就是有个相同的基类。大家都会想到用容器，然后在里面存对象的指针。这方面网上也有很多资料，其中的麻烦都在指针的使用上。我自己也做了个例程，在VC.NET下编译运行通过。最后示例了一个泛型方法find。
//////////////////////////////////////////////////////////////////////////
#pragma once
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;
//////////////////////////////////////////////////////////////////////////
//父类
class Base
{
public :
 Base();
 string GetMyClassName();
 virtual string GetDescription();
 string myClassName;
 string description;
};

Base::Base() { myClassName = "In the Base::Base()";}
string Base::GetMyClassName() { return myClassName;}
string Base::GetDescription()
{
 description = "In the Base::GetDescription()";
 return description;
}
//////////////////////////////////////////////////////////////////////////
//子类A
class DeriveA : public Base
{
public :
 string myDeriveA;
 DeriveA();
 void   SetMyDeriveA();
 string GetMyDeriveA();
 virtual string GetDescription();
};

DeriveA::DeriveA() { myClassName = "In the DeriveA::DeriveA()";}
void DeriveA::SetMyDeriveA() { myDeriveA = "In the DeriveA::SetMyDeriveA()";}
string DeriveA::GetMyDeriveA() { return myDeriveA;}
string DeriveA::GetDescription()
{
 description = "In the DeriveA::GetDescription()";
 return description;
}
//////////////////////////////////////////////////////////////////////////
//子类B
class DeriveB : public Base
{
public :
 string myDeriveB;
 DeriveB();
 void   SetMyDeriveB();
 string GetMyDeriveB();
 virtual string GetDescription();
};

DeriveB::DeriveB() { myClassName = "In the DeriveB::DeriveB()";}
void DeriveB::SetMyDeriveB() { myDeriveB = "In the DeriveB::SetMyDeriveB()";}
string DeriveB::GetMyDeriveB() { return myDeriveB;}
string DeriveB::GetDescription()
{
 description = "In the DeriveB::GetDescription()";
 return description;
}
//////////////////////////////////////////////////////////////////////////
//主程序
int main()
{
 //生成对象
 Base* myBase = new Base;
 DeriveA* myDeriveA = new DeriveA;
 myDeriveA->SetMyDeriveA();
 DeriveB* myDeriveB = new DeriveB;
 myDeriveB->SetMyDeriveB();
 //插入对象
 vector<Base *> MyVector;
 MyVector.empty();
 MyVector.push_back(myBase);
 MyVector.push_back(myDeriveA);
 MyVector.push_back(myDeriveB);
 //调用对象
 vector<Base *>::iterator ThisVector = MyVector.begin();
 cout << "Let's Go !:" << endl;
 int i = 0;
 while( ThisVector != MyVector.end() )
 {
  cout << i <<endl;
  //cout << (**ThisVector).GetMyClassName() << endl; //一般像下面这么写
  cout << (*ThisVector)->GetMyClassName() << endl; //(*ThisVector)的括号不能省，优先级问题
  cout << (*ThisVector)->GetDescription() << endl;
  if ( (*ThisVector)->GetMyClassName().compare("In the DeriveA::DeriveA()") == 0)
  {
   cout << ((DeriveA*)*ThisVector)->GetMyDeriveA() << endl;
  }
  if ( (*ThisVector)->GetMyClassName().compare("In the DeriveB::DeriveB()") == 0)
  {
   cout << (*((DeriveB*)*ThisVector)).GetMyDeriveB() << endl;
   //这是另外一种写法，效果和上面一样的，就是不够简洁
  }
  ThisVector++;
  i++;
 }
 
 //find方法
 cout << endl;
 cout << "Can I find DeriveA ?" << endl;
 ThisVector = find(MyVector.begin(), MyVector.end(), myDeriveA);
 if (ThisVector != MyVector.end())
 {
  cout << (*ThisVector)->GetMyClassName() << endl;
  ((DeriveA*)*ThisVector)->SetMyDeriveA();
  cout << ((DeriveA*)*ThisVector)->GetMyDeriveA() << endl;
  cout << (*ThisVector)->GetDescription() << endl;
  cout << "HO HO !! Certainly, You can !" << endl;
 }
 
 return 0;
}