public static void main(String args[]){
        int op;
        
        do{
            System.out.println("1- Agregar Plan");
            System.out.println("2- Cobrar Plan");
            System.out.println("3- Imprimir Detalle");
            System.out.println("4- Cliente Viejo");
            System.out.println("5- Salir");
            System.out.print("\nEscoja opcion: ");
            op = lea.nextInt();
            
            switch( op ){
                case 1:
                    agregarCliente();
                    break;
                case 2:
                    System.out.println("Ingresar Nombre: ");
                    String n = lea.next();
                    pagoTotalMes( n );
                    break;
                case 3:
                    imprimirDetalle();
                    break;
                case 4:
                    PlanComercial viejo = clienteViejo();
                    System.out.println("Viejo: " + viejo);
                    break;
            }
            
        }while( op != 5 );
        
    }