Rewrite using the Scanner class and a while loop import java.text.DecimalFormat;

Question

Rewrite using the Scanner class and a while loop

import java.text.DecimalFormat;

import javax.swing.JOptionPane;

/**

*/

public class TotalSales
{
public static void main(String[] args)
{
int days;
double totalSales;
String input;

DecimalFormat dollar = new DecimalFormat("#,##0.00");

input = JOptionPane.showInputDialog("For how many days " +
"do you have sales figures?");
days = Integer.parseInt(input);

totalSales = 0.0;

for (int count = 1; count <= days; count++)
{
input = JOptionPane.showInputDialog("Enter the sales " + "for day " + count + ":");
sales = Double.parseDouble(input);
totalsales += sales;
}

JOPtionPane.showMessageDialog(null, "The total sales are $" + dollar.format(totalSales));

System.exit(0);
}
}

Explanation / Answer

import java.text.DecimalFormat;
import java.util.*;
import javax.swing.JOptionPane;

/**

*/

public class TotalSales
{
   public static void main(String[] args)
   {
       int days;
       double totalSales;
       String input;

        DecimalFormat dollar = new DecimalFormat("#,##0.00");

        //input = JOptionPane.showInputDialog("For how many days " +
          //                               "do you have sales figures?");
        Scanner in = new Scanner(System.in);
        System.out.println("For how many days " + "do you have sales figures?");
        days = in.nextInt();

        totalSales = 0.0;

       int count=1;
       while(count<=days)
        {
           input = JOptionPane.showInputDialog("Enter the sales " + "for day " + count + ":");
           sales = Double.parseDouble(input);
           totalsales += sales;
           count++;
        }

        JOPtionPane.showMessageDialog(null, "The total sales are $" + dollar.format(totalSales));

        System.exit(0);
     }
}

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