This is a problem form the book \"starting out with APP INVENTOR FOR ANDROID\" b

Question

This is a problem form the book "starting out with APP INVENTOR FOR ANDROID" by Tony Gaddis and Rebecca Halsey. The answer needs to be run on the emulator connected to the AIStarter. Susan is hired for a job, and her employer agrees to pay her every day. Her employer also agrees that Susan's salary is 1 penny for the first day, 2 pennies for the second day, 4 pennies for the third day, continuing to double each day. Create an app that allows the user to enter the number of days that Susan will work and calculates the toatl amout of pay she will recieve over that period of time.

Explanation / Answer

Answer:)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace pennies_for_Pay_JWA
{
   public partial class penniesForPayCalcJWA : Form
   {
       public penniesForPayCalcJWA()
       {
               InitializeComponent();
       }

       private void calculateBtnJWA_Click(object sender, EventArgs e)
       {
               // Variables initialization
               int count = 1; // Loop control variable
               int days = 1; // days worked
               double currentPay = 0; // The current pay
               double totalPay = 0; //total pay

               // get the number of days
               if (int.TryParse(daysWorkedTxtBoxJWA.Text, out days))
               {
                   for (count = 1; count <= days; count++)
                   {
                       //calculations display
                       currentPay = .01 * Math.Pow(2, days-1);
                       totalPay += currentPay;

                       //add one to the count loop
                           count = count + 1;
                   }
                   //display the ending balance
                   totalPayLblJWA.Text = totalPay.ToString("c");
               }
               else
               {
                   //Invalid number of days entered
                   MessageBox.Show("Invalid value for days.");
               }
       }

       private void clearBtnJWA_Click(object sender, EventArgs e)
       {
               // clear data fields
               daysWorkedTxtBoxJWA.Text = "";
               totalPayLblJWA.Text = "";
       }

       private void exitBtnJWA_Click(object sender, EventArgs e)
       {
               //close the program
               this.Close();
       }
   }
}

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