8.6 fio_sale.cpp

#include <iostream>
#include <fstream>
#include "Sales_data.h"

using namespace std;


int main(int argc, char **argv) {
    if (argc != 2) {
    	cerr << "请给出文件名！" << endl;
    	return -1;
    }
    ifstream in(argv[1]);
    if (!in) {
    	cerr << "无法打开输入文件！" << endl;
    	return -1;
    }

    Sales_data total;
    if (read(in, total)) {
    	Sales_data trans;
    	while (read(in, trans)) {
    		if (total.isbn() == trans.isbn())
    		//	total.combine(trans);
                total += trans;
            else {
            	print(cout, total) << endl;
            	total = trans;
            }
    	}
    	print(cout, total) << endl;
    } 
    else {
    	cerr << "没有数据！" << endl;
    }

    return 0;
}