Price Every Item and Skip the Unknown Ones

The function priceOf(const std::string& item) is already written: it returns the price of apple, bread or milk, and throws a std::runtime_error for any other item. Write priceList(const std::vector<std::string>& items), which goes through the list in order with ONE try/catch per item: print the item name, : and its price, and add the price to a running total; when priceOf throws, catch the std::runtime_error, print Error: followed by its message, and move on to the next item. After the loop print Total: followed by the total of the items that had a price. Putting the try inside the loop is what lets one bad item not cancel the rest.

Do NOT write a main function.