/************************************************************************************
 * @file: OCpc.cpp
 * @author: Fang XS.
 * @version: v1.0
 * @date: Create on 2022-07-09, Modified on xxxx-xx-xx
 * @brief Open Close printciples example.
 ***********************************************************************************/
#include <iostream>

using namespace std;

/* abstract class as an interface */
class ToEat{
public:
    virtual void UseChopsticks() = 0;
};


/** called by the caller 
 * extends 
 * \Depend on the interface
*/
class Meat : public ToEat{
public:
    virtual void UseChopsticks(){
        cout << "Use Chopsticks to eat meat..." << endl;
    }
};
class Rice : public ToEat{
public:
    virtual void UseChopsticks(){
        cout << "Use Chopsticks to eat rice..." << endl;
    }
};


/** caller 
 * \Depend on the interface 
*/
class human : public ToEat{
public:
    virtual void UseChopsticks(){
        ;
    }
    virtual void UseChopsticks(ToEat *te){
        te->UseChopsticks();
    }
};

int main(void)
{
    human * zs = new human();
    zs->UseChopsticks(new Meat);
    zs->UseChopsticks(new Rice);

    delete zs;
    zs = NULL;

    /* Pause the External console*/
    system("pause");
}

/*********************************** END OF FILE ***********************************/