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#include <iostream>
#include <fstream>
#include "sales_data.hpp"
/*
*
* 8.6
*
*
*/
int main (int argc, char **argv) {
if(argc < 2 || argc > 2) {
return -1;
}
std::fstream file(argv[1]);
if(file.fail()) {
return -1;
}
SalesData total;
// variable to hold the running sum
if (read(file, total)) { // read the first transaction
SalesData trans;
// variable to hold data for the next transaction
while(read(file, trans)) {
// read the remaining transactions
if (total.isbn() == trans.isbn())
// check the isbns
total.combine(trans); // update the running total
else {
print(std::cout, total) << std::endl; // print the results
total = trans;
// process the next book
}
}
print(std::cout, total) << std::endl;
// print the last transaction
} else {
// there was no input
std::cerr << "No data?!" << std::endl;
// notify the user
}
}
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