// this is a minimal translation of the specifications into Java 

import java.util.*;

// -----------------------------------------------------------------------------
// the entry point for the ordering process 
class Ordering {
    Vector /* Order */ open = new Vector(); 
    Vector /* Customer */ customers = new Vector(); 
    // --------------------------------------------
    
    Customer lookup(String name) { 
	return null; 
    }

    Order openOrder(Customer c) {
	Order o = new Order(c); 
	open.add(o); 
	return o; 
    }

    // add an order line to o
    void addLine(Order o, Product p, int q) {
	o.addLine(p,q); 
    }

    // compute the value of the order, write to file 
    int closeOrder(Order o) {
	return o.value(); 
    }
}

// -----------------------------------------------------------------------------
// representing a customer 
class Customer {
    String name; 
    String address; 
    Customer(String name, String address) {
	this.name = name; 
	this.address = address; 
    }
}

// -----------------------------------------------------------------------------
// representing an order 
class Order {
    Customer c; 
    Vector /* OrderLine */ lines = new Vector(); 
    // --------------------------------------------

    Order(Customer c) { 
	this.c = c; 
    }

    // add a line for p and q to the order
    void addLine(Product p, int q) {
	lines.add(new OrderLine(p,q)); 
    }

    // compute the value of the order 
    int value() {
	return 10; 
    }
}

// -----------------------------------------------------------------------------
// representing an orderline 
class OrderLine {
    Product p; 
    int q; 
    int value; 
    // --------------------------------------------

    OrderLine(Product p, int q) {
	this.p = p; 
	this.q = q; 
	value = p.price * q;  
    }
}

// -----------------------------------------------------------------------------
// representing a product 
class Product {
    String name; 
    String description; 
    int price; 
    // --------------------------------------------

    Product(String name, String description, int price) { 
	this.name = name; 
	this.description = description; 
	this.price = price; 
    }
}