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#include <iostream>
#include <fstream>
#include "sales_data.hpp"
/*
*
* 8.7
*
*
*/
int main (int argc, char **argv) {
if(argc < 3 || argc > 4) {
return -1;
}
std::ifstream file(argv[1]); // open first file to read
std::ifstream out_file_chk(argv[2], std::ifstream::ate); // Open 2nd file to check if it exists
if(!out_file_chk.is_open()) { // If it does not exist create it
std::cout << "File created." << std::endl;
std::ofstream create_file(argv[2]);
if(create_file.fail()) { return -1; }
create_file.close();
}
if(file.fail()) { // check if first file failed to open
return -1;
}
if(out_file_chk.tellg() > 0) { // Check if the 2nd file had any data
std::cerr << "This file has data" << std::endl;
return -1;
}
out_file_chk.close();
std::ofstream out_file(argv[2]); // Finally open for writing
SalesData total;
if (read(file, total)) {
SalesData trans;
while(read(file, trans)) {
if (total.isbn() == trans.isbn())
total.combine(trans);
else {
print(out_file, total) << std::endl;
total = trans;
}
}
print(out_file, total) << std::endl;
} else {
std::cerr << "No data?!" << std::endl;
}
}
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