#include<iostream>
using namespace std;
class A
{
      public:
             A(){cout<<"constructing A"<<endl;}
             ~A(){cout<<"destructing A"<<endl;}
};    

  class B:public A
{
      public:
             B(){cout<<"constructing B"<<endl;}
             ~B(){cout<<"destructing B"<<endl;}
};  

class C:public B
{
      public:
             C(){cout<<"constructing C"<<endl;}
             ~C(){cout<<"destructing C"<<endl;}
};  

int main()
{
	for(int i=0;i<1;i++)
	{
    C c;                               //如果沒有循環就沒有destructing，因為c沒有失效，而在for的
                                          //循環完成之后，C就失效，就運行析構函數 
	}
    system("pause");
    return 0;
    
    }