quiz_7.3.cpp

/**
 * 修改 7.1.1 节的交易处理程序，令其使用这些成员。
 */

#include "quiz_7.2.hpp"
#include <iostream>

using std::cin;
using std::cout;
using std::endl;

int main()
{
    Sales_data total;
    if (cin >> total.bookNo >> total.units_sold >> total.revenue)
    {
        Sales_data trans;
        while (cin >> trans.bookNo >> trans.units_sold >> trans.revenue)
        {
            if (total.isbn() == trans.isbn())
            {
                total.combine(trans);
            }
            else
            {
                cout << total.bookNo << " " << total.units_sold << " " << total.revenue << endl;
                total = trans;
            }
        }
        cout << total.bookNo << " " << total.units_sold << " " << total.revenue << endl;
    }
    else
    {
        std::cerr << "No data?!" << std::endl;
        return -1;
    }
    return 0;
}