Question

You are required to demonstrate the four-stage process of program development: analysis, design, implementation and testing and as such your service is retained as a business analysis to design the following basic application using C#. Write a program that achieve the following objectives:

Allow the user to: - Enter a Customer Name - Enter an Item name - Enter the last 5 purchases - Computer the average cost of the last 5 purchases - Using a tax of 8% derive the final cost. - The final cost will be 5% lower if purchases are over $1000 - Use message boxes, if conditions coupled with appropriate forms and relevant controls to achieve the above objectives.

Your deliverables are: A. State any assumptions made. B. A completed program that depicts the above expressed requirements. C. Remember to submit both the screen capture and the code in a word doc

Answer 1

Dear Student ,

As per requirement submitted above kindly find below solution.

Here new windows forms application in C# is created using visual studio 2019 with name "PurchaseApp". This application contains a form with name "Form1.cs".Below is the details of this form.

Form1.cs[Design] :

**************************

Form1.cs :

//namespace
using System;
using System.Windows.Forms;
//application namespace
namespace PurchaseApp
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//calculate button click
private void btnCalculate_Click(object sender, EventArgs e)
{
//taking customer name entered by user
string name = txtCustomerName.Text;
//taking item name entered by user
string itemName = txtItemName.Text;
//taking purchase to find total amount
double purchaseAmount = double.Parse(txtPurchase1.Text) + double.Parse(txtPurchase2.Text) + double.Parse(txtPurchase3.Text) + double.Parse(txtPurchase4.Text) + double.Parse(txtPurchase5.Text);
//calculate average cost
double avgCost = purchaseAmount / 5;
//calculating final cost
double finalCostwithTax = purchaseAmount + purchaseAmount * 0.08;
//checking final cost
if (finalCostwithTax > 1000)
{
//then give additional discount of 5%
finalCostwithTax = finalCostwithTax - finalCostwithTax * 0.05;
}
//display details in the Message box
MessageBox.Show("Customer Name :" + name + Environment.NewLine + "Item Name : " + itemName + Environment.NewLine + "Average Purchase Amount : " + avgCost.ToString("0.00") + Environment.NewLine + "Purchase Amount : " + purchaseAmount.ToString("0.00") + Environment.NewLine + "Final Cost : " + finalCostwithTax.ToString("0.00"));
}
}
}

==================================

Output :Run application using F5 and will get the screen as shown below

Screen 1:

Screen 2:Screen showing purchase amount details

NOTE :PLEASE FEEL FREE TO PROVIDE FEEDBACK ABOUT THE SOLUTION.