//DISPLAY 15.12 Use of a Virtual Function
//Demonstrates the performance of the virtual function bill.
#include <iostream>
#include "sale.h" //Not really needed, but safe due to ifndef.
#include "discountsale.h"
using namespace std;
using namespace salesavitch;

int main()
{
    Sale simple(10.00);//One item at $10.00.
    DiscountSale discount(11.00, 10);//One item at $11.00 with a 10% discount.

    cout.setf(ios::fixed);
    cout.setf(ios::showpoint);
    cout.precision(2);

    if (discount < simple)
    {
        cout << "Discounted item is cheaper.\n";
        cout << "Savings is $" << simple.savings(discount) << endl;
    }
    else


        cout << "Discounted item is not cheaper.\n";

    return 0;
}