Коллекция полиморфных объектов

#include <iostream>
#include <iomanip>
#include <cmath>
 
 
using namespace std;
 
class Human
{
protected: 
    string name;
    string surname;
    int year;
    string passport;
    string workplace;
    double salary;
 
public:
    Human();
    Human(string name, string surname, int year, string passport, string workplace);
    void setName(string n);
    string getName();
    void setSurname(string sur);
    string getSurname();
    void setYear(int y);
    int getYear();
    void setPassport(string p);
    string getPassport();
    void setWorkplace(string w);
    string getWorkplace();
    
    int age();
    virtual void setSalary() = 0;
    double getSalary();
};
 
class Diller:public Human
{
protected:
    int cCount;
 
public:
 
    Diller();
    Diller(string name, string surname, int year, string passport, string workplace, int cCount);
    void setcCount(int c);
    int getcCount();
    void setSalary();
};
 
class Student :public Human
{
protected:
    int grade[5];
    float avg;
public:
    int getGrade();
    void setGrade(int ocinka[5]);
    Student();
    Student(string name, string surname, int year, string passport, string workplace, int k[5], int avg);
    float sBal();
    void setSalary();
 
};
 
class Doctor:public Human
{
protected:
    int pCount;
 
public:
 
    Doctor();
    Doctor(string name, string surname, int year, string passport, string workplace, int pCount);
    void setpCount(int p);
    int getpCount();
    void setSalary();
 
};
 
double Human::getSalary()
{
    return salary;
}
 
Human::Human()
{
    year = 1;
    salary = 1.20;
}
 
Human::Human(string name, string surname, int year, string passport, string workplace)
{
    this->name = name;
    this->surname = surname;
    this->year = year;
    this->passport = passport;
    this->workplace = workplace;
 
}
 
void Human::setName(string n)
{
    n = name;
}
 
string Human::getName()
{
    return name;
}
 
void Human::setSurname(string sur)
{
    sur = surname;
}
 
string Human::getSurname()
{
    return surname;
}
 
void Human::setYear(int y)
{
    y = year;
}
 
int Human::getYear()
{
    return year;
}
 
void Human::setPassport(string p)
{
    p = passport;
}
 
string Human::getPassport()
{
    return passport;
}
 
void Human::setWorkplace(string w)
{
    w = workplace;
}
 
string Human::getWorkplace()
{
    return workplace;
}
 
int Human::age()
{
    time_t now = time(0);
    tm* ltm = localtime(&now);
    int age;
 
    age = (ltm->tm_year + 1900) - year;
    return age;
 
}
 
void Human::setSalary()
{
}
 
Diller:: Diller()
{
    year = 1;
    salary = 1.20;
    cCount = 5;
}
 
Diller::Diller(string name, string surname, int year, string passport, string workplace, int cCount)
{
    this->name = name;
    this->surname = surname;
    this->year = year;
    this->passport = passport;
    this->workplace = workplace;
    this->cCount = cCount;
}
 
void Diller::setcCount(int c)
{
    c = cCount;
}
 
int Diller::getcCount()
{
    return cCount;
}
 
void Diller::setSalary()
{
    salary = 3.4 * cCount;
}
 
int Student::getGrade()
{
     for (int i = 0; i < 5; i++) 
     { 
         return grade[i]; 
     } 
}
 
void Student::setGrade(int ocinka[5])
{
    for (int i = 0; i < 5; i++)
    {
        grade[i]=ocinka[i];
    } 
}
 
Student::Student(string name, string surname, int year, string passport, string workplace, int k[5], int avg)
{
    this->name = name;
    this->surname = surname;
    this->year = year;
    this->passport = passport;
    this->workplace = workplace;
 
    this->avg = avg;
    for (int i = 0; i < 5; i++)
    {
        grade[i] = k[i];
    }
}
 
 
Student::Student()
{
    for (int i = 0; i < 5; i++)
    {
        grade[i]=0;
    }
    avg = 0;
    salary = 1.20;
}
 
 
float Student::sBal()
{
    int i;
    float sum = 0, avg;
    for (i = 0; i < 5; i++){
        sum = sum + grade[i];
    avg = sum / 5;
    }
    return avg;
}
 
void Student::setSalary()
{
    salary = avg * 500;
}
Doctor::Doctor()
{
    year = 1;
    salary = 1.20;
    pCount = 10;
}
 
Doctor::Doctor(string name, string surname, int year, string passport, string workplace, int pCount)
{
    this->name = name;
    this->surname = surname;
    this->year = year;
    this->passport = passport;
    this->workplace = workplace;
    this->pCount = pCount;
}
 
void Doctor::setpCount(int p)
{
    p = pCount;
}
 
int Doctor::getpCount()
{
    return pCount;
}
 
void Doctor::setSalary()
{
    salary = pCount * 20;
}
 
 
int main() {
    setlocale(LC_ALL, "rus");
    Human* mas[3];
 
    system("pause");
    return 0;
 
}

mas[0]=new Diller;
mas[1]=new Student;
mas[2]=new Doctor;