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Having a minor issue with my program

cplusplusnewb89 (4)
I'm working on a vending machine program but i'm having trouble getting it to output change correctly. My code is listed below, can someone point out what i'm doing wrong please?

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#include <iostream>
#include <string>

using namespace std;

void vendingMenu();

int main()
{
	//Declaration block
	int userSelection = 0;
	int itemPrice = 0;
	int itemNumber = 0;
	int userChange = 0;
	double userCashAmount = 0;
	double itemOnePrice = 1.50;
	double itemTwoPrice = 0.75;
	double itemThreePrice = 0.90;
	double itemFourPrice = 0.75;
	double itemFivePrice = 1.75;
	double itemSixPrice = 0.75;

	vendingMenu();

	cout << "Please enter the item number you want: ";
	cin >> userSelection;

	if (userSelection == 1)
	{
		cout << "Enter your money amount: ";
		cin >> userCashAmount;

		cout << "Thank you for purchasing item #1.  Your change is: " << userChange << endl;

		userChange = userCashAmount - itemOnePrice;
	}
	else
		if (userSelection == 2)
		{
			cout << "Enter your money amount: ";
			cin >> userCashAmount;

			cout << "Thank you for purchasing item #2. Your change is: " << userChange << endl;

			userChange = userCashAmount - itemTwoPrice;
		}
		else
			if (userSelection == 3)
			{
				cout << "Enter your money amount: ";
				cin >> userCashAmount;

				cout << "Thank you for purchasing item #3. Your change is: " << userChange << endl;

				userChange = userCashAmount - itemThreePrice;
			}
			else
				if (userSelection == 4)
				{
					cout << "Enter your money amount: ";
					cin >> userCashAmount;

					cout << "Thank you for purchasing item #4. Your change is: " << userChange << endl;

					userChange = userCashAmount - itemFourPrice;
				}
				else
					if (userSelection == 5)
					{
						cout << "Enter your money amount: ";
						cin >> userCashAmount;

						cout << "Thank you for purchasing item #5. Your change is: " << userChange << endl;

						userChange = userCashAmount - itemFivePrice;
					}
					else
						if (userSelection == 6)
						{
							cout << "Enter your money amount: ";
							cin >> userCashAmount;

							cout << "Thank you for purchasing item #6. Your change is: " << userChange << endl;

							userChange = userCashAmount - itemSixPrice;
						}

	system("pause");
	return 0;
}

void vendingMenu()
{
	cout << "Vending Machine" << endl;
	cout << "1 1.50" << endl;
	cout << "2 0.75" << endl;
	cout << "3 0.90" << endl;
	cout << "4 0.75" << endl;
	cout << "5 1.75" << endl;
	cout << "6 0.75" << endl;
}

void purchaseSummary()
{
	cout << "Purchase Summary";
	
	int itemsPurchased = 0;
	int totalCost = 0; 
	int moneyInserted = 0;
	int changeReturned = 0;

	{
		cout << "Number of items purchased: " << itemsPurchased << endl;
		cout << "Total cost of all items purchased: " << totalCost << endl;
		cout << "Total Amount of money inserted: " << moneyInserted << endl;
		cout << "Total Amount of change returned: " << changeReturned << endl;
	}
}
cplusplusnewb89 (4)
bump
wildblue (1505)
The code is outputting the message about the user change before it's calculated.
wildblue (1505)
also userChange should be a double
cplusplusnewb89 (4)
Ah I see, thank you :)
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