oop_decorating_2

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

class Base {
public:
    virtual void show() = 0;
    virtual ~Base() {}
};

class Person: public Base {
    char * name;
    char * EGN;
public:
    Person(const char* nme, const char* egn) {
        int n = strlen(nme)+1;
        name = new char[n];
        strcpy_s(name,n,nme);
        n = strlen(egn)+1;
        EGN = new char[n];
        strcpy_s(EGN,n,egn);
    }
    ~Person() { delete [] name; delete [] EGN; }
    void show() {
        cout<< name << ", EGN:" << EGN << endl;
    }
};

class Student: public Base {
    Base & obj;
    char * vuz;
    unsigned FNO;
public:
    Student(Base& obj, const char* uz, unsigned FNO): obj(obj), FNO(FNO) {
        int n = strlen(uz)+1;
        vuz = new char[n];
        strcpy_s(vuz,n,uz);
    }
    void show() {
        obj.show();
        cout <<"\tStudent at " << vuz <<", F#"<< FNO << endl;
    }
    ~Student(){ delete [] vuz; }
};

class Employee: public Base {
    Base& obj;
    char * job;
    unsigned ENO;
public:
    Employee( Base& obj, const char * jb, unsigned ENO ): obj(obj), ENO(ENO) {
        int n = strlen(jb)+1;
        job = new char[n];
        strcpy_s(job,n,jb);
    }
    ~Employee(){ delete [] job; }
    void show() {
        obj.show();
        cout <<"\tEmployed at "<<job<<", S#"<<ENO<<endl;
    }
};

int main() {
        setlocale(0,"");
    Base& a = Person( "Иван Петров", "9012345678"),
        & b = Student(a, "НБУ", 651234 ),
        & c = Employee(b, "Мусала Софт ООД",5678),
        & d = Employee(c, "Сухи пасти ЕООД", 523);
    a.show();
    b.show();
    c.show();
    d.show();


    system("PAUSE");
    return EXIT_SUCCESS;
}