单继承的构造函数和析构函数1

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

class B:public A
{ public: 
 B() {  cout<<"B Constructor..."<<endl; }
~B() {  cout<<"B Destructor..."<<endl;  }         
};

int main()
{ B b;
}