继承中的特殊关系隐藏

#include<iostream>
using namespace std;
class person
{
protected:
int age;
public:
void print()
{cout<<age<<endl;}
/* person()
{age=18;}
*/


};
class worker:public person
{
private:
int age;
public:
void print()
{cout<<age<<endl;}
worker()
{age=20;person::age=18;}
};
void main()
{
worker A;
A.print();//调用类子类函数
A.person::print();//调用父类函数
}