//********************************************************
// The following code example is taken from the book
//  C++20 - The Complete Guide
//  by Nicolai M. Josuttis (www.josuttis.com)
//  http://www.cppstd20.com
//
// The code is licensed under a
//  Creative Commons Attribution 4.0 International License
//  http://creativecommons.org/licenses/by/4.0/
//********************************************************


module;

#include <vector>    // gcc needs this

module Mod2;         // implementation unit of module Mod2

import :Order;       // import internal partition Order 

double Customer::sumPrice() const
{
  double sum = 0.0;
  for (const Order& od : orders) {  // ERROR with VC++
  //for (const auto& od : orders) {  // OK
    sum += od.count * od.price;
  }
  return sum;
}

double Customer::averagePrice() const
{
  if (orders.empty()) {
    return 0.0;
  }
  return sumPrice() / orders.size();
}