How to use an object attribute to increment a counter?

Question

I have the exercise practically solved, it lacks only an "accountant".

"For the determination of the monthly receivables per employee, the clients they raise should be counted. Each customer must have an attribute with the identification of the employee who collected it."

One of the attributes of each Client is the name of the employee who "raised". How, when going through an array with Customers, Employees and even more some types of objects (all of the same super class), I can make the number of clients raised from the Employee increase according to the number of clients raised by him?

I hope you can understand the doubt, I’m having a little trouble explaining what I want..

Answer 1

In the employee class Voce can have a list of clients agariados (0 for N) In the customer class have a reference of 0 for 1 with the employee who participated In the agariar method (in the employee class) receives the client class as reference and adds it in the employee’s list of agariates and arrow the reference of the employee who squatted.

That is in C# would look like this, (in Java should be very similar) :

private abstract class Pessoa {
    private string nome_;
}

private class Funcionario : Pessoa {
    private List<Cliente> clientesAgariados_ = new List<Cliente>();

    private void Agariar(Cliente cliente) { 
        cliente.setAgariador(this);
        clientesAgariados.add(cliente);
    }

    public int ClientesAgariados()
    {
        return clientesAgariados.count;
    }
}

private class Cliente : Pessoa {
    private Funcionario agariador_;

    public void setAgariador(Functionario funcionario)
    {
        agariador_ = funcionario;
    }
}

In the main method you do what is necessary and check the number of customers greeted by the function:

public static Main() {
     Funcionario funcionario = new Funcionario;
     Cliente cliente1 = new Cliente;
     Cliente cliente2 = new Cliente;

     funcionario.Agariar(cliente1);
     funcionario.Agariar(cliente2);

     Console.WriteLine(funcionario.ClientesAgariados().toString());
}