#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;

double stock(int shares, double purPrice, double buyComm, double salePrice, double saleComm);

{
double profit = ((shares * salePrice) - saleComm) - ((shares * purPrice) + buyComm);

return profit;
}
int main()
{
int numShares;
double salePrice, saleCommission, purchasePrice, purchaseCommission, profit_or_loss;

while (numShares != -99)
{
cout << endl << "Enter -1 to get the profit." << endl;
cout << "Number of shares purchased: ";
cin >> numShares;
if (numShares != -1)
{
 cout << "Purchase Price per share: ";
cin >> purchasePrice;
cout << "Purchase Commission Paid: ";
cin >> purchaseCommission;
cout << "Sale Price per Share: ";
cin >> salePrice;
cout << "Sale Commission Paid: ";
cin >> saleCommission;

profit_or_loss = stock(numShares, purchasePrice, purchaseCommission, salePrice, saleCommission);
}
}
if (profit_or_loss < 0)
{
cout << "That is a loss of $ " << profit_or_loss << endl << endl;
}
else
{
cout << "That is a profit of $ " << profit_or_loss << endl << endl;
}
return 0;
}