Personnel *person=NULL;
    PersonnelNode *node=NULL;
    PersonnelNode *temp, *prev;
    Student *s=new Student();
         while (temp != NULL) {
         person = temp->getNode();
         if (stricmp(name,name)==0){
                prev = temp;
                temp = temp->getNext();
                index++;
            }
         else{
            cout <<"Person to delete is found at index" << index<<endl;
            display_node(person, index);
            s=person;
            s->bookQueue->enqueue(title, due);
            }
 
         }

s = (Student*)person;

#include <iostream>
 
using namespace std;
 
class base
{
public:
    virtual ~base() {cout << "Inside ~base()" << endl ;}
    virtual void some_function() {cout << "Inside base::some_function()" << endl ;}
};
 
class derived : public base
{
public:
    ~derived() {cout << "Inside ~derived()" << endl ;}
    void some_function() {cout << "Inside derived::some_function()" << endl ;}
    void special_function() {cout << "Inside derived::special_function()" << endl ;}
};
 
void free_function( base *pb )
{
    pb->some_function() ;
    //special case, when we need to do something with derived class..
    //example of bad OOD. :)
    derived *converted_pd = dynamic_cast< derived* > ( pb ) ;
    if( 0 != converted_pd )
        converted_pd->special_function() ;
    else
        cout << "dynamic_cast returned NULL. pb was NOT pointing to an obj of type derived." << endl ;
}
 
int main()
{
    derived *pd = new derived() ;
    base *pb = new base() ;
    base *converted_pb = dynamic_cast<base*>( pd ) ;
 
    cout << "Calling free_function() with converted_pb." << endl ;
    free_function(converted_pb) ;
 
    cout << "Calling free_function() with pb." << endl ;
    free_function(pb) ;
 
    return 0 ;
}

#include <iostream>
 
using namespace std;
 
class base
{
public:
    virtual ~base() {cout << "Inside ~base()" << endl ;}
    virtual void some_function() {cout << "Inside base::some_function()" << endl ;}
};
 
class derived : public base
{
public:
    ~derived() {cout << "Inside ~derived()" << endl ;}
    void some_function() {cout << "Inside derived::some_function()" << endl ;}
    void special_function() {cout << "Inside derived::special_function()" << endl ;}
};
 
void free_function( base *pb )
{
    pb->some_function() ;
    //special case, when we need to do something with derived class..
    //example of bad OOD. :)
    derived *converted_pd = dynamic_cast< derived* > ( pb ) ;
    if( 0 != converted_pd )
        converted_pd->special_function() ;
    else
        cout << "dynamic_cast returned NULL. pb was NOT pointing to an obj of type derived." << endl ;
 
    cout << endl << "Doing C-style casting" << endl ;
    converted_pd = (derived*) pb ;
    if( 0 != converted_pd )
        converted_pd->special_function() ;
    else
        cout << "C-style cast returned NULL. pb was NOT pointing to an obj of type derived." << endl ;
}
 
int main()
{
    derived *pd = new derived() ;
    base *pb = new base() ;
    base *converted_pb = dynamic_cast<base*>( pd ) ;
 
    cout << endl << "Calling free_function() with converted_pb." << endl ;
    free_function(converted_pb) ;
 
    cout << endl << "Calling free_function() with pb." << endl ;
    free_function(pb) ;
 
    return 0 ;
}

#include <iostream>
 
using namespace std;
 
enum ActionEnum { GET_LAN_STATUS,
        SHUTDOWN_LAN
     } ;
 
class employee
{
public:
    employee(const string nameStr):name(nameStr) {}
    virtual ~employee() {cout << "Inside ~employee()" << endl ;}
    virtual void get_status_of_office_LAN() {cout << "get_status_of_office_LAN() by: " << name.c_str() << endl ;}
    string getname() { return name ; }
protected:
    string name ;
};
 
class administrator : public employee
{
public:
    administrator(const string nameStr):employee(nameStr) {}
    ~administrator() {cout << "Inside ~administrator()" << endl ;}
    void get_status_of_office_LAN() {cout << "get_status_of_office_LAN() by: " << name.c_str() << endl ;}
    void shutdown_office_LAN() {cout << "LAN shutdown by: " << name.c_str() << endl ;}
};
 
void perform_action( employee *pb, ActionEnum action )
{
    switch( action )
    {
        case GET_LAN_STATUS:
        {
            pb->get_status_of_office_LAN() ;
            break ;
        }
 
        case SHUTDOWN_LAN:
        {
            administrator *converted_pd = dynamic_cast< administrator* > ( pb ) ;
            if( 0 != converted_pd )
                converted_pd->shutdown_office_LAN() ;
            else
                cout << pb->getname().c_str() << ": does not have required rights to shutdown LAN." << endl ;
 
            cout << endl << "Doing C-style casting" << endl ;
            converted_pd = (administrator*) pb ;
            if( 0 != converted_pd )
                converted_pd->shutdown_office_LAN() ;
            else
                cout << pb->getname().c_str() << ": does not have required rights to shutdown LAN." << endl ;
        }
        default: break;
    }
}
 
int main()
{
    administrator *pd = new administrator("Some administrator") ;
    employee *pb = new employee("NOT an administrator") ;
 
    cout << endl << "Calling perform_action(GET_LAN_STATUS) with pb." << endl ;
    perform_action(pb, GET_LAN_STATUS) ;
    cout << endl << "Calling perform_action(SHUTDOWN_LAN) with pb." << endl ;
    perform_action(pb, SHUTDOWN_LAN) ;
 
    return 0 ;
}