第一章11.txt

本书在复习C++基础知识后

#include <iostream.h>
class CRoot
{
public:
		int small;
		CRoot(int n = 2) { small = n;}
		void showsmall(){ cout<<"small = "<<small<<endl; }
};
class CDer1: public CRoot
{
public:
		CDer1(int m)
			:CRoot(m) 
		{}
};
class CDer2: public CRoot
{
public:
		int small;
		CDer2(int n = 0) { small = n;}
};
int  main()
{
		CRoot A;
		CDer1 B(3);
		CDer2 C;
		A.showsmall();		B.showsmall();		C.showsmall();
		return 0;
}