A Second Example

Objectives

1. Write a program that computes the total sales for a salesperson.

Notes

• A company has a single salesperson. Each day they sell a number of items and enter this information into a file, one line per day. They always use the following format:
  • The number of items they sold
  • The cost of the items sold that day.
• For example, if they sold 4 items for a total sales of $423.34, the file would contain
  4 423.34
• You are to write a program that
  • Calculates the total days
  • Calculates the total items sold.
  • Calculates the total sales amount .
  • Calculates the average of items and amount per day.
• The data is contained in "mySales.txt"
• If you think about this.
  • It is essentially the same as the previous problem.
  • Open the file.
  • Read each line
    • and accumulate daily items and amount
    • Count the items.
  • Print the totals.

  • import java.io.*;
    import java.util.Scanner;
    
    public class SalesComputer {
        public static void main(String[] args) {
            Scanner myScanner;
    
            int count = 0;
    
            int items = 0;
            int totalItems = 0;
            double averageItems = 0;
    
            double sales = 0;
            double totalSales = 0;
            double averageSales = 0;
    
            try {
                  myScanner = new Scanner(new File("mySales.txt"));
            } catch (FileNotFoundException e) {
                  System.out.println("Cound ont open mySales.txt");
                  return;
            }
    
            while (myScanner.hasNextInt()) {
                  items = myScanner.nextInt();
                  sales = myScanner.nextDouble();
                  count++;
                  totalItems += items;
                  totalSales += sales;
    
                  System.out.printf("Sold %d items for %.2f.\n", items, sales);
            }
    
            System.out.printf("Items were sold on %d days.\n",count);
            System.out.printf("\t %d items were sold in total.",totalItems);
            System.out.printf("\t $%.2f total in sales.\n",totalSales);
    
            if (count > 0) {
                averageItems = (float) totalItems / (float) count;
                averageSales = (float) totalSales / (float) count;
    
                System.out.printf("\t Average items %.0f.\n", averageItems);
                System.out.printf("\t Average Sales $%.2f.\n", averageSales);
            }
    
             myScanner.close();
        }
    }