School Assignment

Ryan Hammond

Hey Guys,

This is my first post here, possibly my first of many after today. I am brand new to C#. I have a school assignment and I've been working on it for hours. I cannot figure it out. I'm not looking for the answers, just help.

Here's the assignment:

Form Specification:

Use a label for the title of the club. Name it anything that you wish. Place it in the center and top of the form.
Use labels to prompt the user for the input data and for the titles of the output results.
Place a textbox across from each label, to input the data and output the results.
Place a calculate button in between the input and output.
Place a close button on the bottom right of the form.
Put your name in a label positioned under the close button on the bottom right of the form.

Code Specification:

In the calculate_Click event method:

a. Assign the input (i.e., number of tickets and price per ticket) from the textboxes to variables.

b. Call a void method named calcAmount to calculate the subtotal, the HST tax amount, and the total. Pass the arguments for number of tickets and price per ticket by value (i.e., the default); and pass the arguments for subtotal, the HST tax amount, and the total by reference.

c. Display the results by assigning the values to the appropriate textboxes.

In the close_Click event method:

Close the form.

In the void method, calcAmount:

Declare a constant variable for the HST amount and initialize it with the value 0.13.
Calculate the subtotal, the HST tax amount, and the total (assigning the results to the parameters.)

Here's my code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Assignment_2._2
{
///

/// Interaction logic for MainWindow.xaml
///

    public partial class MainWindow : Window
    {
        double getSubTotal;
        double getTax;
        double getGrandTotal;

        public MainWindow()
        {
            InitializeComponent();
        }

        private static void btnCalc_Click(object sender, RoutedEventArgs e)
        {
            // get textbox values
            int numOfTix = int.Parse(txtNumOfTickets.Text);
            double pricePer = double.Parse(txtPricePerTicket.Text);
        }

        private static void calcAmount(int numOfTix, double pricePer, ref double getSubTotal, ref double getTax, ref double getGrandTotal)
        {
            const double HST_SALES_TAX = 0.13;

            double subTotal = numOfTix * pricePer;
            double tax = subTotal * HST_SALES_TAX;
            double total = tax + subTotal;

            getSubTotal = double.Parse(subTotal.ToString());
            getTax = double.Parse(tax.ToString());
            getGrandTotal = double.Parse(total.ToString());

        }
    }
}

9 Replies

Know the answer? Post it — somebody with the same question will find it here.

Sam Hobbs15y ago
Accepted answer
The important thing that Prabhu is saying is that you need to call calcAmount.

Your instructor described the program quite specifically and clearly. The specifications are saying to use "ref" for the total, subtotal and the HST tax amount and you did that. I don't see a reason why "out" would be necessary.
0
Sam Hobbs15y ago
Sorry. I meant that you have a great start at being a great programmer.
0
Ryan Hammond15y ago
haha. well i certainly have the satisfaction of achieving the assignment. i just thought i missed something when you said good start. thanks for all your help! this is a great forum

0
Sam Hobbs15y ago
I have not looked at your code as closely as I could, but I am not aware of anything missing. Is there anything causing you to be concerned? Hopefully the only thing missing is the satisfaction of achieving the assignment.
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Ryan Hammond15y ago
Everything works exactly as it should when I run the code. Is there anything I am missing?
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Sam Hobbs15y ago
Very good, Ryan. You have a good start.
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Ryan Hammond15y ago
nevermind got it.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Assignment_2._2
{
    ///

    /// Interaction logic for MainWindow.xaml
    ///

    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        double getSubTotal;
        double getTax;
        double getGrandTotal;

        private void btnCalc_Click(object sender, RoutedEventArgs e)
        {
            // Assign variable and collect user input
            int numOfTix = int.Parse(txtNumOfTickets.Text);
            double pricePer = double.Parse(txtPricePerTicket.Text);

            calcAmount(numOfTix, pricePer, ref getSubTotal, ref getTax, ref getGrandTotal);
        }

        private void calcAmount(int numOfTix, double pricePer, ref double getSubTotal, ref double getTax, ref double getGrandTotal)
        {
            const double HST_SALES_TAX = 0.13;

            double subTotal = numOfTix * pricePer;
            double tax = subTotal * HST_SALES_TAX;
            double total = tax + subTotal;

            getSubTotal = subTotal;
            getTax = tax;
            getGrandTotal = total;

            txtSubTotal.Text = subTotal.ToString("C");
            txtHSTTax.Text = tax.ToString("C");
            txtTotal.Text = total.ToString("C");
        }

        private void btnClose_Click(object sender, RoutedEventArgs e)
        {
            this.Close();
        }
    }
}

thanks everyone
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Ryan Hammond15y ago
Thanks Sam. I rewrote the code so it works. I am still lost in regards to referencing and passing the variable. Could you provide me some help?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Assignment_2._2
{
    ///

    /// Interaction logic for MainWindow.xaml
    ///

    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void btnCalc_Click(object sender, RoutedEventArgs e)
        {
            // Assign variable and collect user input
            int numOfTix = int.Parse(txtNumOfTickets.Text);
            double pricePer = double.Parse(txtPricePerTicket.Text);

            calcAmount(numOfTix, pricePer);
        }

        private void calcAmount(int numOfTix, double pricePer)
        {
            const double HST_SALES_TAX = 0.13;

            double subTotal = numOfTix * pricePer;
            double tax = subTotal * HST_SALES_TAX;
            double total = tax + subTotal;

            txtSubTotal.Text = subTotal.ToString("C");
            txtHSTTax.Text = tax.ToString("C");
            txtTotal.Text = total.ToString("C");
        }

        private void btnClose_Click(object sender, RoutedEventArgs e)
        {
            this.Close();
        }
    }
}
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Prabhu Raja15y ago
Try this.

double getSubTotal;
        double getTax;
        double getGrandTotal;

        public MainWindow()
        {
            InitializeComponent();
        }

        private static void btnCalc_Click(object sender, RoutedEventArgs e)
        {
            // get textbox values
            int numOfTix = int.Parse(txtNumOfTickets.Text);
            double pricePer = double.Parse(txtPricePerTicket.Text);

// Call your calcAmount () function Here
this.calcAmount(numOfTix, pricePer, out getSubTotal, out getTax, out getGrandTotal);

        }

//Change ref keyword to out keyword
        private static void calcAmount(int numOfTix, double pricePer, out double getSubTotal, out double getTax, out double getGrandTotal)
        {
            const double HST_SALES_TAX = 0.13;

            double subTotal = numOfTix * pricePer;
            double tax = subTotal * HST_SALES_TAX;
            double total = tax + subTotal;

            getSubTotal = double.Parse(subTotal.ToString());
            getTax = double.Parse(tax.ToString());
            getGrandTotal = double.Parse(total.ToString());

          //assign the calculated values to your result box
        }

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Thank You

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