e9.cpp

一、教学目的： 能理解C++中运算符重载的需要性

#include<iostream.h>          

class Animal
{
public:
	Animal(){}
	void eat(){cout<<"eat "<<endl;}
};
class Giraffe:protected Animal//私有继承
{
public:
	Giraffe(){}
	void strechNeck(double){cout<<"strechneck "<<endl;}
	void take()
	{
		eat();
	}
};
void main()
{
	Giraffe gir;
//	gir.eat();//error
	gir.take();//ok
}