#include <iostream.h>
class A								//定义类
{
public:
	A()
	{
		cout<<"基类的构造函数"<<endl;
	}
	~A()
	{
		cout<<"基类的析构函数"<<endl;
	}
};
class B:public A					//从A类派生
{
public:
	B()
	{
		cout<<"派生类B的构造函数"<<endl;
	}
	~B()
	{
		cout<<"派生类B的析构函数"<<endl;
	}
};
class C:public B					//从B类派生，而B从A派生
{
public:
	C()
	{
		cout<<"派生类C的构造函数"<<endl;
	}
	~C()
	{
		cout<<"派生类C的析构函数"<<endl;
	}
};
void main()
{
	C c;							//定义对象
}