C++ Stock::setPrice方法代码示例

Stock PgsqlDataProvider::getStock(uint32_t id)
{
  nontransaction command(*conn);  
  string query = "SELECT id, price FROM get_stock(" + to_string(id) + ");";
  result queryResult(command.exec(query));
  
  if (verbose)
    cout << "Result of " << query << ": " << endl;

  if (queryResult.size() != 1)
  {
    cerr << "getStock: Incorrect number of results: " << queryResult.size() << endl;
    throw invalid_argument("getStock: Incorrect number of results.");
  }

  if (queryResult[0][0].is_null())
  {
    cerr << "getStock: Stock id = " << id << " does not exist." << endl;
    throw invalid_argument("getStock: Stock does not exist.");
  }

  Stock stock;
  stock.setId(queryResult[0][0].as<int>());
  stock.setPrice(Decimal(queryResult[0][1].as<string>()));
  if (verbose)
    cout << "Stock: id = " << stock.getId() << ", price = " << stock.getPrice() << endl;

  return stock;
}

//.........这里部分代码省略.........
               bStock = stocks1.front();
               cout << "\tBought "
                    << bStock.getAmount() << " shares at "
                    << bStock.getPrice() << endl;
               stocks1.pop();
            }
            
            cout << "Sell History:\n";
            for (j = 0; !stocks2.empty(); j++)
            {
               sStock = stocks2.front();
               cout << "\tSold "
                    << sStock.getAmount() << " shares at "
                    << sStock.getPrice() << " for a profit of ";
               cout << (sTotal - total) << endl;
               stocks2.pop();
            }
         }
         else if(buy)
         {
            int i;
            cout << "Currently held:\n";
            for (i = 0; !stocks1.empty(); i++)
            {
               bStock = stocks1.front();
               cout << "\tBought " << bStock.getAmount() << " shares at "
                    << bStock.getPrice() << endl;
               stocks1.pop();
            }
         }
         else if(sell)
            sStock = stocks2.front();

         cout << "\nProceeds: " << (sTotal - total) << endl;
      }
      else if (command == "buy")
      {
         //get bought amount and price from user
         cin >> amount >> price;
         //add to bought total
         total += (price * amount);

         //amount and price of current bought stock transaction
         bStock.setAmount(amount);
         bStock.setPrice(price);
         //we did buy stock
         buy = true;
         //add to the bought stock queue
         bStocks.push(bStock);
      }
      else if (command == "sell")
      {
         //get sell amount and price from user
         cin >> sAmount >> sPrice;
         //add to sell total
         sTotal += (sPrice * sAmount);

         //amount and price of current sold stock transaction
         sStock.setAmount(sAmount);
         sStock.setPrice(sPrice);

         //we did sell stock
         sell = true;

         //add sold stock to queue
         sStocks.push(sStock);

         //to allow us to go into the loop to find total sold stocks
         int tmp = 1;

         // should to handle the selling of stocks
         for (; tmp != 0;)
         {
            //if there are no more bought stocks left leave
            if (bStocks.empty())
               break;
            
            bStock = bStocks.front();
            tmp = (sStock.getAmount() - bStock.getAmount());
            Dollars tmpD = sStock.getPrice() - bStock.getPrice();

            //if we didn't finish selling one bought transaction
            //we save that number into bought stock
            if (tmp < 0)
            {
               tmp *= -1;
               bStock.setAmount(tmp);
               bStocks.front() = bStock;
               tmp = 0;
            }
            else if (tmp > 0)
            {
               bStocks.pop();
            }
               
            Dollars Profit = tmpD * bStock.getAmount();
            profit.push(Profit);
         }
         //while (tmp == 0);
      }

void SetStockPricesEqual( Stock & s1, Stock & s2 )
{	
	s1.setPrice( s2.getPrice() );
}