实用的程序员编程工具

				#include 
				
				class base 
				{
				 public:
				   base(void) {cout 				   ~base(void) {cout 				 };
				
				class derived1 : public base 
				{
				 public:
				   derived1(void) {cout 				   ~derived1(void) {cout 				 };
				
				class derived2 : public derived1 
				{
				 public:
				   derived2(void) {cout 				   ~derived2(void) {cout 				 };
				
				void main(void)
				 {
				   derived2 object;
				 }