public class EmployeeManager {


  public static final int MAX_SIZE = 20;

  private Payable[] employees;
  private int n = 0;


  public EmployeeManager() {

    employees = new Payable[MAX_SIZE];
  }


  public void addEmployee(Payable p) throws Exception {

    if (n == MAX_SIZE) {
      throw new Exception("The University is Full");
    }

    for (int i = 0; i < n; i++) {
      if (employees[i].getName().equals(p.getName())) {
        throw new Exception("An employee by this name (" + p.getName() + ") already exists");
      }
    }

    employees[n] = p;
    n++;
  }


  public void payEmployee(String name, double hoursWorked, float payRate) throws Exception {

    for (int i = 0; i < n; i++) {
      if (employees[i].getName().equals(name)) {
        try {
          employees[i].setPayRate(payRate);
          double paid = employees[i].addHoursWorked(hoursWorked);
          System.out.println("Employee " + employees[i].getName() + " has been paid: $" + paid);
        } catch (Exception e) {
          System.out.println(e.getMessage());
        }
        return;
      }
    }

    throw new Exception("An employee by name " + name + " does not exist and cannot be paid");
  }


  public void payEmployee(String name, double hoursWorked) throws Exception {

    for (int i = 0; i < n; i++) {
      if (employees[i].getName().equals(name)) {
        try {
          employees[i].addHoursWorked(hoursWorked);
        } catch (Exception e) {
          System.out.println(e.getMessage());
        }
        return;
      }
    }

    throw new Exception("An employee by name " + name + " does not exist and cannot be paid");
  }


  public void printAll() {

    for (int i = 0; i < n; i++) {
       System.out.println(employees[i]);
       employees[i].printAccount();
    }
  }
}