Sorting a Vector of Class Object

[rodsRisk]

I am trying to do a selection sort with a vector passed as a reference and compare different vector object elements. Is this possible?

The error I'm getting is:

1>c:\users\rodrigo\documents\visual studio 2010\projects\salesorder\salesorder\source1.cpp(93): error C2784: 'bool std::operator <(const std::vector<_Ty,_Ax> &,const std::vector<_Ty,_Ax> &)' : could not deduce template argument for 'const std::vector<_Ty,_Ax> &' from 'Order'

1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\vector(1502) : see declaration of 'std::operator <'

Like I said, I'm novice when it comes to classes and what is allowable so please be patient with me.

My code is as follows:

#include <iostream>
#include <iomanip>
#include <string>
#include <vector>

using namespace std;

class Order
{
	int bidPrice;
	int lots;
	int acctNum;
public:
	Order (int bidPrice, int lots, int acctNum);
	Order () {};
	void assignOrder (int , int, int);
	void sortOrders (vector<Order>& orders, int);
	void printOrder ();
	//void assignPrice (int newPrice);
	//void assignLots (int newLots);
	//void assignAcct (int newAcct);
	bool executable(int offerPrice);
	void execute(void);
};

//Order Orders;

int main ()
{
	vector <Order> orders;
	Order tmpOrder;
	int bPrice;
	int bLots;
	int bAcct;
//	int offer;
	string logOff;

	
	cout << "Welcome to the Financial Instrument Order System\n";
	cout << "To exit the program at any time, please type Quit\n";

	cout << "Please Enter Your Order\n";
	cout << endl;
	cout << endl;
	
	cout << "Price		Lots		Account Number\n";
	cout << "_____		____		______________\n";
	

	while (logOff != "Quit")
	{
		cin >> left >> setw(5) >> bPrice;
		cin >> left >> setw(5) >> bLots;
		cin >> left >> setw(5) >> bAcct;

		tmpOrder.assignOrder(bPrice, bLots, bAcct);
		

		for (int i=0; i <= orders.size(); i++)
		{
			orders.push_back(tmpOrder);
			cout << "\n";
			tmpOrder.sortOrders(orders, orders.size());
			tmpOrder.printOrder();
			cout << "\n";
			break;
		}
	
	}
	return 0;
}

void Order::assignOrder(int bPrice, int bLots, int bAcct)
{
	bidPrice = bPrice;
	lots = bLots;
	acctNum = bAcct;
}

void sortOrders(vector<Order>& orders, int length)
{
	int index;
	int smallestIndex;
	int location;
	Order temp;

	for (index = 0; index < length - 1; index++)
	{
		//Step a
		smallestIndex = index;
			
		for (location = index + 1; location < length; location++)
			if (orders[location] < orders[smallestIndex])
				smallestIndex = location;
					
			//Step b
		temp = orders[smallestIndex];
		orders[smallestIndex] = orders[index];
		orders[index] = temp;
	}
}

[helios]

Order doesn't overload operator<(), so you can't compare two Orders.

[Stewbond]

Add the following to your Order class. This will allow line 93 to work.

bool operator< (Order& o)
{
    return bidPrice < o.bidPrice;
}