Problem with my code...

[CodeLearner90]

Hey guys. I'm having some trouble with this program that I'm writing. At first I was getting an error saying 'Use of unassigned local variable 'dblAccumulatedCharges' and 'Use of unassigned local variable 'dblNumberOfGroups'. So I inserted 'dblAccumulatedCharges = 0;' and 'dblNumberOfGroups = 0;' into the code. From that point, I am able to run the program. My problem is that when I run the program, none of the output is correct, except the group name. The output for dblNumberOfGroups is stuck at zero, the output for dblAccumulatedCharges is stuck at zero, the average charge outputs 'NaN' (Not sure why it isn't recognized as a number), and the dblCurrentCharge seems to be incorrect. I would greatly appreciate any help, or for anyone just to point me in the right direction. I don't expect you to solve it for me. Pointing me in the right direction is a better learning process anyways. But, answer how you would like.

My .Net version is 3.5

Here is the code:


namespace Recording_Studio
{
public partial class Form1 : Form
{
//Global Declarations: Accumulated Charges, Total Amount of Groups, and a constant for the Rental Rate
double totalAccumulatedCharges = 0;
double totalNumberOfGroups = 0;
double rentalRate = 200 / 60;
double count = 0;

public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{

}

private void btnCalculate_Click(object sender, EventArgs e)
{
// Declarations: Input - Name, Minutes used.
// Output - Current charge, Group name, Accumulated Charges, Average Charge, Number of Groups
double dblMinutesUsed;
double dblAverageCharge, dblCurrentCharge, dblAccumulatedCharges, dblNumberOfGroups;
dblAccumulatedCharges = 0;
dblNumberOfGroups = 0;
//Input - Gather the data
try
{
dblMinutesUsed = double.Parse(txtMinutesUsed.Text);

}
catch
{
MessageBox.Show("Input was either non-numeric or blank", "Invalid Input!");
txtMinutesUsed.Focus();
return;
}

//Process - Calculate Current Charge, Accumulated Charges, Number of Groups, and Average charge
dblCurrentCharge = dblMinutesUsed * rentalRate;
dblAverageCharge = dblAccumulatedCharges / dblNumberOfGroups;
totalAccumulatedCharges = totalAccumulatedCharges + dblAccumulatedCharges;
totalNumberOfGroups = totalNumberOfGroups + dblNumberOfGroups;
//count++;
//totalAccumulatedCharges++;
//totalAmountOfGroups++;

//Output - Display the information

//Clear all the output listboxes
lstAccumulatedCharges.Items.Clear();
lstAverageCharge.Items.Clear();
lstCurrentCharge.Items.Clear();
lstGroupName.Items.Clear();
lstNumberOfGroups.Items.Clear();

//Display the information
lstAccumulatedCharges.Items.Add(dblAccumulatedCharges.ToString("n1"));
lstAverageCharge.Items.Add(dblAverageCharge.ToString("n1"));
lstCurrentCharge.Items.Add(dblCurrentCharge.ToString("n1"));
lstGroupName.Items.Add(txtGroupName.Text);
lstNumberOfGroups.Items.Add(dblNumberOfGroups.ToString("n1"));

}

private void btnClear_Click(object sender, EventArgs e)
{
// Clear all input text boxes and output list boxes
txtGroupName.Clear();
txtMinutesUsed.Clear();
lstAccumulatedCharges.Items.Clear();
lstAverageCharge.Items.Clear();
lstCurrentCharge.Items.Clear();
lstGroupName.Items.Clear();
lstNumberOfGroups.Items.Clear();
txtGroupName.Focus();
}

private void btnExit_Click(object sender, EventArgs e)
{
this.Close();
}
}
}


Thank you very much, your help is greatly appreciated!