#include<iostream>
#include <string>
using namespace std;
class Base
{
public:
  string content;
  Base(string c)
  {  content=c;      cout<<"Base 构造函数!"<<endl;  }
  Base(const Base& b)
  {  content=b.content;  cout<<"Base 拷贝构造函数!"<<endl;  }
};
class Div:public Base
{
public:
  Div(string cc)
  {  cout<<"Div 构造函数!"<<endl;  }
  Div(const Div& d)
  {  cout<<"Div 拷贝构造函数!"<<endl;  }
};
int main()
{
  Div a("aaa"),b(a);   return 0;
}