c++ 构造函数深层复制示例

/*******************************************************
 *author：彭晓林
 *copyright: 版权所有，翻版不究
 *function: 构造函数深层复制示例
 ******************************************************/

#include <iostream>
#include <string>

using namespace std;

class DEMO
{ 
 public:
  DEMO(int a)
  {
   int* temp = new int;
   x = temp;

   *x = a;
  }
  void set(int a)
  {
   *x = a;
  }
  DEMO(DEMO &demo)
  {
   int* a = new int;

   *a = *(demo.x);
   *x = *a;
  }
 void print();

 private:
  int* x;
};

void DEMO::print()
{
 cout<<"x = "<<*x<<endl;
 cout<<"x address :"<<x<<endl;
}

int main()
{
 DEMO* TestA = new DEMO(1); 

 TestA->print();

 DEMO TestB(*TestA);

 TestB.print();

 TestB.set(32);

 TestA->print();

 TestB.print();

 while(1);
}