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

// Base class
class Employee {
protected:
    string name;
    int id;

public:
    Employee(string n, int i) {
        name = n;
        id = i;
    }

    virtual void calculateSalary() = 0; // Pure virtual function

    void displayInfo() {
        cout << "Name: " << name << ", ID: " << id << endl;
    }
};

// Derived class for Faculty
class Faculty : public Employee {
private:
    int coursesTaught;
    double salaryPerCourse;

public:
    Faculty(string n, int i, int courses, double perCourse)
        : Employee(n, i), coursesTaught(courses), salaryPerCourse(perCourse) {}

    void calculateSalary() {
        double salary = coursesTaught * salaryPerCourse;
        cout << "Faculty Salary: $" << salary << endl;
    }
};

// Derived class for Staff
class Staff : public Employee {
private:
    double hourlyWage;
    int hoursWorked;

public:
    Staff(string n, int i, double wage, int hours)
        : Employee(n, i), hourlyWage(wage), hoursWorked(hours) {}

    void calculateSalary() {
        double salary = hourlyWage * hoursWorked;
        cout << "Staff Salary: $" << salary << endl;
    }
};

// Main function to demonstrate the hierarchy
int main() {
    // Creating Faculty object
    Faculty faculty("Dr. Smith", 101, 3, 2000.0);
    faculty.displayInfo();
    faculty.calculateSalary();

    // Creating Staff object
    Staff staff("John Doe", 201, 15.0, 160);
    staff.displayInfo();
    staff.calculateSalary();

    return 0;
}