#include <iostream>

 #include <string.h>

 #include <unistd.h>

 using namespace std;

 class Father {

 private:

     int money;

 protected:

     int room_key;

 public:

     int address;

     void it_skill(void)

     {

         cout<<"father's it skill"<<endl;

     }

     int getMoney(void)

     {

         return money;

     }

     void setMoney(int money)

     {

         this->money = money;

     }

 };

 class Son_pub : public Father {

 private:

     int toy;

 public:

     void play_game(void)

     {

         int m;

         cout<<"son play game"<<endl;

         /* money -= 1;

          * 错: 不能直接拿父亲的私房钱

          */

         /*

          * 但是可以问他要

          */

         m = getMoney();

         m--;

         setMoney(m);

         room_key = ;

     }

 };

 class Son_pro : protected Father {

 private:

     int toy;

 public:

     void play_game(void)

     {

         int m;

         cout<<"son play game"<<endl;

         /* money -= 1;

          * 错: 不能直接拿父亲的私房钱

          */

         /*

          * 但是可以问他要

          */

         m = getMoney();

         m--;

         setMoney(m);

         room_key = ;

     }

 };

 class Son_pri : private Father {

 private:

     int toy;

 public:

     void play_game(void)

     {

         int m;

         cout<<"son play game"<<endl;

         /* money -= 1;

          * 错: 不能直接拿父亲的私房钱

          */

         /*

          * 但是可以问他要

          */

         m = getMoney();

         m--;

         setMoney(m);

         room_key = ;

     }

 };

 int main(int argc, char **argv)

 {

     Son_pub s_pub;

     Son_pro s_pro;

     Son_pri s_pri;

     s_pub.play_game();

     s_pro.play_game();

     s_pri.play_game();

     s_pub.it_skill();

     //s_pro.it_skill();  // error

     //s_pri.it_skill();     // error

     return ;

 }