Array not Passing Parameter to function Main()

[dlundy1]

Hey guys, I am having problems passing array values from a sub function back to my main function.

For Ex:

int getInventory (vector<string> u, vector<string> v, vector<double> w, vector<double> x, vector<int> y, ifstream& q)
/* 
productName = U || itemId = V || mPrice = W || sPrice = X || stock = Y
*/
{
//Calling the File into the Program.
ifstream inData;
inData.open ("input.txt");
		
//Check If file exists		
if (inData)
{
	
//controlling the appearance of cout.
cout << setprecision(2) << fixed << showpoint;
				
//Updating the Array with each of the appropriate Values.
int i;
for (i = 0; i < 5; i++)
{
inData >> u[i] >> v[i] >> w[i] >> x[i] >> y[i];

/*cout <<" " << u[i] << " " << v[i] << " " << "$" << w[i]
<< " " << "$" << x[i] << " " << y[i];*/
cout << endl;
}
cout << "Manufacture Price = $" << w[4];
return 0;
}

This returns the correct manufacture price.
But when I call the same value from the main function it displays 0.00

int main()
{
	// BEGIN getInventory Variables (coded by DL)
	vector<string> productName(5);
	vector<string> itemId(5);
	vector<double> mPrice(5);
	vector<double> sPrice(5);
	vector<int> stock(5);
	int choice;
	string customerName;
	ifstream inData;
	
	
	// END getInventory Variables
	
	// BEGIN DL's Functions
		 getInventory(productName, itemId, mPrice, sPrice, stock, inData); // Calls getInventory Function
		 welcome(customerName);// Calls CSR (customer service Rep) Function
		 findChoice(choice, customerName); // Finds user's Choice
		 choiceCheck(choice, customerName); // Checks if user input is Valid
		 executeChoice(itemId, sPrice, choice, stock, customerName); // Performs user's choice
		 buyItem(productName, itemId, sPrice, stock);
		 
	 // END DL's Functions
	
	cout << "Manufacture Price: " << mPrice[4];
	
	return 0;

Any Ideas?

[jlb]

If you want any of the changes made inside your function to be reflected in your calling function you'll need to pass the variables by reference, instead of passing by value.

#include <iosteam>

void someFunct(int &byReference, int byValue)
{
   byReference += 10;
   byValue += 10;

   cout << byReference << " " << byValue << endl;
}


int main()
{
   int a =  0; b = 100;
   someFunct(a, b);

   cout << "a in main(): " <<  a << " b in main(): " << b << endl;

   return 0;
}