Class-рабочие

#include <iostream>
#include <string>

using namespace std;
class person{
public:
    string name;
    string surname;
    int age;
public:
    person(string name_, string surname_, int n){
        name = name_;
        surname = surname_;
        age = n;
    }
    person(string name_, string surname_ ){
        name = name_;
        surname = surname_;
        age = 0;
    }
    void say_hello(){
        if(age == 0){
            cout <<"hello my name is " << name << " " << surname << endl;
        }
        else{
            cout <<"hello my name is " << name << " " << surname << ". I'm " << age << " years old."<< endl;
        }
    }

};
class Worker:public person{
protected:
    float salary;
    string jobname;
public:
    Worker(string name_, string surname_,int age, float salary_, string jobname_) : person(name_, surname_, age){
        salary = salary_;
        jobname = jobname_;
    }
    void say_hello(){
        person::say_hello();
        cout << "Salary = " << salary << "\t" << "Jobname = " << jobname << endl;
    }
};
int main()
{
    Worker a = Worker("John", "Doe", 18, 0.0,"slave");
    a.say_hello();
}