//==============================================================================
// Include Files
//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
#include <iostream>
#include <string>
//==============================================================================
// Name Space
//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
using namespace std;
//==============================================================================
// Class
//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
class                   ParentClass {
    //--------------------------------------------------------------------------
    public:
                        ParentClass() {                 // Constructor
          //this->SetName();		// ERROR!!
        }
                       ~ParentClass() {                 // Destructor
        }
        virtual void    ShowName(void) {
            cout<<"The name is "<<this->name<<endl;
        }
    //--------------------------------------------------------------------------
    protected:
        virtual void    SetName(void)=0;
        string          name;
    //--------------------------------------------------------------------------
};
//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
class                   ChildClassA:public ParentClass {
    //--------------------------------------------------------------------------
    public:
                        ChildClassA() {                 // Constructor
            cout<<"ChildClassA be created."<<endl;
          //this->SetName();
        }
                       ~ChildClassA() {                 // Destructor
            cout<<"ChildClassA be killed."<<endl;
        }
    //--------------------------------------------------------------------------
    protected:
        virtual void    SetName(void) {
            this->name = "Tom";
        }
    //--------------------------------------------------------------------------
};
//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
class                   ChildClassB:public ParentClass {
    //--------------------------------------------------------------------------
    public:
                        ChildClassB() {                 // Constructor
            cout<<"ChildClassB be created."<<endl;
          //this->SetName();
        }
                       ~ChildClassB() {                 // Destructor
            cout<<"ChildClassB be killed."<<endl;
        }
    //--------------------------------------------------------------------------
    protected:
        virtual void    SetName(void) {
            this->name = "Sam";
        }
    //--------------------------------------------------------------------------
};
//==============================================================================
// Main
//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
int                     main() {
    //--------------------------------------------------------------------------
    ChildClassA         *child_a;
    child_a = new ChildClassA();
    child_a->ShowName();
    delete child_a;
    //--------------------------------------------------------------------------
    ChildClassB         *child_b;
    child_b = new ChildClassB();
    child_b->ShowName();
    delete child_b;
    //--------------------------------------------------------------------------
    return (0);
}
//==============================================================================