Question

Write java program that reads daily sales for 30 days until -1 is entered and find and display the following:

a) average sales for 30 days.

b) number of days that daily sales over $5000.00

            

Answer 1

import java.util.*;

public class Main
{
   public static void main(String[] args)
   {
   //variable declaration
   int days, count;
   float sum, average, sales;
   Scanner sc = new Scanner(System.in);
  
   //variable initialization
   sum = 0;
   days = 0;
   count = 0;
  
   while(true)
   {
   //get user input
       System.out.print("Sales of day "+(days+1)+": ");
       sales = sc.nextInt();
      
       //break the loop if sales is -1
       if(sales == -1)
       break;
      
       //calculate the sum
       sum = sum + sales;
      
       //count the sales over 5000
       if(sales>5000)
       count++;
      
       //increment the days by one
       days++;
   }
  
   //calculate the average
   average = sum / days;
  
   //display the result
   System.out.println("\nAverage sales for "+days+" days = "+average);
   System.out.println("The number of days that sales over $5000.00: "+count);
   }
}

OUTPUT:

Sales of day 1: 23424
Sales of day 2: 1000
Sales of day 3: 30000
Sales of day 4: 40000
Sales of day 5: 6000
Sales of day 6: 434
Sales of day 7: 455
Sales of day 8: 6767
Sales of day 9: 7878
Sales of day 10: 454
Sales of day 11: 233
Sales of day 12: 454
Sales of day 13: 57
Sales of day 14: 65
Sales of day 15: 767
Sales of day 16: 7
Sales of day 17: 67
Sales of day 18: 77
Sales of day 19: 676
Sales of day 20: 45
Sales of day 21: 322
Sales of day 22: 12
Sales of day 23: 54
Sales of day 24: 65
Sales of day 25: 76
Sales of day 26: 87
Sales of day 27: 98
Sales of day 28: 43
Sales of day 29: 65
Sales of day 30: 200
Sales of day 31: -1

Average sales for 30 days = 3996.0667
The number of days that sales over $5000.00: 6