Структура: Описать структуру с именем ORDER

#include <iostream>
#include <string>
 
const int BUFSIZE = 10;
 
struct Order {
    std::string payer_account;
    std::string receiver_account;
    long sum;
    Order() : sum(0) {};
friend std::istream &operator>>(std::istream & ,Order &);
friend std::ostream &operator<<(std::ostream &, const Order &);
};
 
void sort_for_Sum(Order* )  ;
void needSum(Order*,long );
 
int main()
{
Order order[BUFSIZE];
long  testsum = 0;
 
for(int i = 0; i < BUFSIZE; ++i )
{
    std::cout << "Order : " << i + 1 << "\nEnter :  payer_account, receiver_account and sum\n";
    std::cin >> order[i];
}
    sort_for_Sum(order);
    std::cout << "\nAfter sort :\n";
 
for(int i = 0; i < BUFSIZE; ++i )
{
    std::cout << "Order " << i + 1 << "\npayer_account, receiver_account and sum\n";
    std::cout << order[i];
}
    std::cout << "\n  Enter a test sum :\n";
    std::cin >> testsum;
    needSum(order,testsum);
 
system("pause");
return 0;
}
 
std::istream &operator>>(std::istream & is,Order &order)
{
  is >> order.payer_account >> order.receiver_account >> order.sum;
  return is;
}
std::ostream &operator<<(std::ostream &stream, const Order &order)
 {
   return stream << order.payer_account << '\n' << order.receiver_account <<'\n' <<  order.sum << '\n';
 }
 
void sort_for_Sum(Order* order) 
{
  Order tmp;
  for(int j = 1; j < BUFSIZE; j ++)
  for (int i = 0; i < BUFSIZE - j; i++)
  {
   if (order[i].sum > order[i + 1].sum)
      {
        tmp = order[i];
        order[i]  = order[i + 1] ;
        order[i + 1]  = tmp;
        }
   }
}
 
 
void needSum(Order* order,long testsum)
{
    std::cout << "Orders with need sums \n";
bool flag = false;
for(int i = 0; i < BUFSIZE; ++i )
{
    if(order[i].sum > testsum)
    {
        flag = true;
        std::cout <<  order[i]; 
    }
}
    if(!flag) std::cout << "not found .\n";
}