int main()
{
Sales_item total; // variable to hold data for the next transaction
// read the first transaction and ensure that there are data to process
if(std::cin >> total)
{
Sales_item trans; // variable to hold the running sum
// read and process the remainning transactions
while(std::cin >> trans)
{
// if we're still processing the same book
if(total.isbn() == trans.isbn())
{
total += trans;
}
else
{
// print results for the previous book
std::cout << total << std::endl;
total = trans; // total now refers to the next book
}
}
std::cout << total << std::endl; // print the last transaction
}
else
{
inline bool
operator==(const Sales_item &lhs, const Sales_item &rhs)
{
// must be made a friend of Sales_item
return lhs.units_sold == rhs.units_sold &&
lhs.revenue == rhs.revenue &&
lhs.isbn() == rhs.isbn();
}
int main()
{
Sales_item total;
if( cin >> total ){
Sales_item trans;
while( cin >> trans ){
if( total.isbn() == trans.isbn() ){
total += trans;
}else{
cout<< total << endl;
total = trans;
}
}
cout<< total << endl;
}else{
int main()
{
Sales_item total;
if(std::cin >> total) {
Sales_item trans;
while(std::cin >> trans) {
if(total.isbn() == trans.isbn()) {
total += trans;
}else {
std::cout << total << std::endl;
total = trans;
}
}
std::cout << total << std::endl;
}else {
int main()
{
Sales_item total;
if(cin >> total){
Sales_item current;
while(cin >> current){
if(total.isbn() == current.isbn())
total += current;
else{
cout << total << endl;
total = current;
}
}
cout << total << endl;
}
return 0;
}
int main()
{
Sales_item total;
if(std::cin >> total){
Sales_item foo;
while(std::cin >> foo)
{
if(total.isbn() == foo.isbn())
total += foo;
else
{
std::cout << total << std::endl;
total = foo;
}
std::cout << total << std::endl;
}
}
else
{
int main()
{
// iterators that can read and write Sales_items
istream_iterator<Sales_item> item_iter(cin), eof;
ostream_iterator<Sales_item> out_iter(cout, "\n");
// store the first transaction in sum and read the next record
Sales_item sum = *item_iter++;
while (item_iter != eof) {
// if the current transaction (which is in item_iter)
// has the same ISBN
if (item_iter->isbn() == sum.isbn())
sum += *item_iter++; // add it to sum
// and read the next transaction
else {
out_iter = sum; // write the current sum
sum = *item_iter++; // read the next transaction
}
}
out_iter = sum; // remember to print the last set of records
return 0;
}
bool compareIsbn(const Sales_item &lhs, const Sales_item &rhs)
{
return lhs.isbn() == rhs.isbn();
}
bool compare(const Sales_item &s1, const Sales_item &s2)
{
return s1.isbn() < s2.isbn();
} /* ----- end of function compareIsbn ----- */
