#include <iostream>
#include <cstring>
using namespace std;

class Person
{
    char* name;
public:
    Person() : name(nullptr) {}
    Person(const char *);
    Person(const Person&);
    ~Person();
    void print() const;
    void changeName(const char* newName);
};

Person::Person(const char* n) : name(new char[strlen(n)+1])
{
    strcpy(name,n);
}

Person::Person(const Person& obj)
: name(new char[strlen(obj.name)+1])
{
   strcpy(name,obj.name);     // perform a deep copy
}

Person::~Person()
{
    delete [] name;
    name = nullptr;
}

void Person::print() const
{
    cout << name << endl;
}

void Person::changeName(const char* newName)
{
   strcpy(name,newName);
}

int main()
{
   Person john("John Smith");
   Person clone(john);
   john.print();
   clone.print();

   clone.changeName("John Clone");

   john.print();
   clone.print();
   cout << "End of program" << endl;

   Person joe("Joe");
   Person harry("Harry");
   joe = harry;
}