13-b-access-specifiers.cpp

#include <iostream> 
using namespace std; 

class Employee {  
    int pay_rate; 

    public: 
    // these are called setters and getters 
    void set_pay_rate(int pay_rate) {   
        if(pay_rate > 14) { 
            this->pay_rate = pay_rate; 
        } else { 
            cout << "Pay rate "<< pay_rate <<" not acceptable. Not setting ... " << endl; 
        }
    }

    int get_pay_rate() { 
        return pay_rate; 
    }
};

class FacultyMember : public Employee { 
    public: 

    // if we override this method, that's an error 
    // for this, we need to make the pay_rate "protected"
    void set_pay_rate(int pay_rate) {   
        if(pay_rate > 25) { 
            this->pay_rate = pay_rate;              
        } else { 
            cout << "Pay rate "<< pay_rate <<" not acceptable. Not setting ... " << endl; 
        }
    }
};



int main() { 
    Employee a; 

    // a.pay_rate = 10;   // error 
    
    a.set_pay_rate(15); 
    cout << "Current pay rate: " << a.get_pay_rate() << endl; 

    a.set_pay_rate(11); 
    cout << "Current pay rate: " << a.get_pay_rate() << endl; 
    
    a.set_pay_rate(20); 
    cout << "Current pay rate: " << a.get_pay_rate() << endl; 
    
    // return 0; 


    /// --------- 
    cout << "Creating a FacultyMember instance ... " << endl; 
    FacultyMember f; 
    f.set_pay_rate(20); 
    cout << "Current pay rate: " << f.get_pay_rate() << endl; 
    
    f.set_pay_rate(11); 
    cout << "Current pay rate: " << f.get_pay_rate() << endl; 
        
    f.set_pay_rate(29); 
    cout << "Current pay rate: " << f.get_pay_rate() << endl; 

}